Improper Input Validation vulnerability in Apache Tomcat. Tomcat did not limit HTTP/0.9 requests to the GET method. If a security constraint was configured to allow HEAD requests to a URI but deny GET requests, the user could bypass that constraint on GET requests by sending a (specification invalid) HEAD request using HTTP/0.9. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.14, from 10.1.0-M1 through 10.1.49, from 9.0.0.M1 through 9.0.112. Older, EOL versions are also affected. Users are recommended to upgrade to version 11.0.15 or later, 10.1.50 or later or 9.0.113 or later, which fixes the issue.

The remote SUSE Linux SLES15 / SLES_SAP15 / openSUSE 15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2026:0932-1 advisory.

    Update to Tomcat 9.0.115:

    - CVE-2025-66614: client certificate verification bypass due to virtual host mapping (bsc#1258371).
    - CVE-2026-24733: improper input validation on HTTP/0.9 requests (bsc#1258385).
    - CVE-2026-24734: certificate revocation bypass due to incomplete OCSP verification checks (bsc#1258387).

    Changelog:

     * Catalina      + Fix: 69623: Additional fix for the long standing regression that meant      that calls to ClassLoader.getResource().getContent() failed when made from      within a web application with resource caching enabled if the target      resource was packaged in a JAR file. (markt)      + Fix: Pull request #923: Avoid adding multiple CSRF tokens to a URL in the      CsrfPreventionFilter. (schultz)      + Fix: 69918: Ensure request parameters are correctly parsed for HTTP/2      requests when the content-length header is not set. (dsoumis)      + Update: Update the minimum and recommended versions for Tomcat Native to      1.3.4. (markt)      + Add: Add a new ssoReauthenticationMode to the Tomcat provided      Authenticators that provides a per Authenticator override of the SSO Valve      requireReauthentication attribute. (markt)      + Fix: Ensure URL encoding errors in the Rewrite Valve trigger an exception      rather than silently using a replacement character. (markt)      + Fix: 69871: Increase log level to INFO for missing configuration for the      rewrite valve. (remm)      + Fix: Add log warnings for additional Host appBase suspicious values.
     (remm)      + Fix: Remove hard dependency on tomcat-jni.jar for catalina.jar.
     org.apache.catalina.Connector no longer requires      org.apache.tomcat.jni.AprStatus to be present. (markt)      + Add: Add the ability to use a custom function to generate the client      identifier in the CrawlerSessionManagerValve. This is only available      programmatically. Pull request #902 by Brian Matzon. (markt)      + Fix: Change the SSO reauthentication behaviour for SPNEGO authentication      so that a normal SPNEGO authentication is performed if the SSL Valve is      configured with reauthentication enabled. This is so that the delegated      credentials will be available to the web application. (markt)      + Fix: When generating the class path in the Loader, re-order the check on      individual class path components to avoid a potential      NullPointerException. Identified by Coverity Scan. (markt)      + Fix: Fix SSL socket factory configuration in the JNDI realm. Based on pull      request #915 by Joshua Rogers. (remm)      + Update: Add an attribute, digestInRfc3112Order, to      MessageDigestCredentialHandler to control the order in which the      credential and salt are digested. By default, the current, non-RFC 3112      compliant, order of salt then credential will be used. This default will      change in Tomcat 12 to the RFC 3112 compliant order of credential then      salt. (markt)
     * Cluster      + Add: 62814: Document that human-readable names maybe used for      mapSendOptions and align documentation with channelSendOptions. Based on      pull request #929 by archan0621. (markt)
     * Clustering      + Fix: Correct a regression introduced in 9.0.109 that broke some clustering      configurations. (markt)
     * Coyote      + Fix: Prevent concurrent release of OpenSSLEngine resources and the      termination of the Tomcat Native library as it can cause crashes during      Tomcat shutdown. (markt)      + Fix: Avoid possible NPEs when using a TLS enabled custom connector. (remm)      + Fix: Improve warnings when setting ciphers lists in the FFM code,      mirroring the tomcat-native changes. (remm)      + Fix: 69910: Dereference TLS objects right after closing a socket to      improve memory efficiency. (remm)      + Fix: Relax the JSSE vs OpenSSL configuration style checks on SSLHostConfig      to reflect the existing implementation that allows one configuration style      to be used for the trust attributes and a different style for all the      other attributes. (markt)      + Fix: Better warning message when OpenSSLConf configuration elements are      used with a JSSE TLS implementation. (markt)      + Fix: When using OpenSSL via FFM, don't log a warning about missing CA      certificates unless CA certificates were configured and the configuration      failed. (markt)      + Add: For configuration consistency between OpenSSL and JSSE TLS      implementations, TLSv1.3 cipher suites included in the ciphers attribute      of an SSLHostConfig are now always ignored (previously they would be      ignored with OpenSSL implementations and used with JSSE implementations)      and a warning is logged that the cipher suite has been ignored. (markt)      + Add: Add the ciphersuite attribute to SSLHostConfig to configure the      TLSv1.3 cipher suites. (markt)      + Add: Add OCSP support to JSSE based TLS connectors and make the use of      OCSP configurable per connector for both JSSE and OpenSSL based TLS      implementations. Align the checks performed by OpenSSL with those      performed by JSSE. (markt)      + Add: Add support for soft failure of OCSP checks with soft failure support      disabled by default. (markt)      + Add: Add support for configuring the verification flags passed to      OCSP_basic_verify when using an OpenSSL based TLS implementation. (markt)      + Fix: Fix OpenSSL FFM code compatibility with LibreSSL versions below 3.5.
     + Fix: Don't log an incorrect certificate KeyStore location when creating a      TLS connector if the KeyStore instance has been set directly on the      connector. (markt)      + Fix: HTTP/0.9 only allows GET as the HTTP method. (remm)      + Add: Add strictSni attribute on the Connector to allow matching the      SSLHostConfig configuration associated with the SNI host name to the      SSLHostConfig configuration matched from the HTTP protocol host name. Non      matching configurations will cause the request to be rejected. The      attribute default value is true, enabling the matching. (remm)      + Fix: Graceful failure for OCSP on BoringSSL in the FFM code. (remm)      + Fix: 69866: Fix a memory leak when using a trust store with the OpenSSL      provider. Pull request #912 by aogburn. (markt)      + Fix: Fix AJP message length check. Pull request #916 by Joshua Rogers.
     * Jasper      + Fix: 69333: Correct a regression in the previous fix for 69333 and ensure      that reuse() or release() is always called for a tag. (markt)      + Fix: 69877: Catch IllegalArgumentException when processing URIs when      creating the classpath to handle invalid URIs. (remm)      + Fix: Fix populating the classpath with the webapp classloader      repositories. (remm)      + Fix: 69862: Avoid NPE unwrapping Servlet exception which would hide some      exception details. Patch submitted by Eric Blanquer. (remm)
     * Jdbc-pool      + Fix: 64083: If the underlying connection has been closed, don't add it to      the pool when it is returned. Pull request #235 by Alex Panchenko. (markt)
     * Web applications      + Fix: Manager: Fix abrupt truncation of the HTML and JSON complete server      status output if one or more of the web applications failed to start.
     (schultz)      + Add: Manager: Include web application state in the HTML and JSON complete      server status output. (markt)      + Add: Documentation: Expand the documentation to better explain when OCSP      is supported and when it is not. (markt)
     * Websocket      + Fix: 69920: When attempting to write to a closed Writer or OutputStream      obtained from a WebSocket session, throw an IOException rather than an      IllegalStateExcpetion as required by Writer and strongly suggested by      OutputStream. (markt)
     * Other      + Add: Add property 'gpg.sign.files' to optionally disable release artefact      signing with GPG. (rjung)      + Add: Add test.silent property to suppress JUnit console output during test      execution. Useful for cleaner console output when running tests with      multiple threads. (csutherl)      + Update: Update the internal fork of Commons Pool to 2.13.1. (markt)      + Update: Update the internal fork of Commons DBCP to 2.14.0. (markt)      + Update: Update Commons Daemon to 1.5.1. (markt)      + Update: Update ByteBuddy to 1.18.3. (markt)      + Update: Update UnboundID to 7.0.4. (markt)      + Update: Update Checkstyle to 12.3.1. (markt)      + Add: Improvements to French translations. (markt)      + Add: Improvements to Japanese translations provided by tak7iji. (markt)      + Add: Improvements to Chinese translations provided by Yang. vincent.h and      yong hu. (markt)      + Update: Update Tomcat Native to 1.3.5. (markt)      + Add: Add test profile system for selective test execution. Profiles can be      specified via -Dtest.profile=<name> to run specific test subsets without      using patterns directly. Profile patterns are defined in      test-profiles.properties. (csutherl)      + Update: Update file extension to media type mappings to align with the      current list used by the Apache Web Server (httpd). (markt)      + Update: Update Commons Daemon to 1.5.0. (markt)      + Update: Update Byte Buddy to 1.18.2. (markt)      + Update: Update Checkstyle to 12.2.0. (markt)      + Add: Improvements to Spanish translations provided by White Vogel. (markt)      + Add: Improvements to French translations. (remm)      + Update: Update the internal fork of Apache Commons BCEL to 6.11.0. (markt)      + Update: Update to Byte Buddy 1.17.8. (markt)      + Update: Update to Checkstyle 12.1.1. (markt)      + Update: Update to Jacoco 0.8.14. (markt)      + Update: Update to SpotBugs 4.9.8. (markt)      + Update: Update to JSign 7.4. (markt)      + Update: Update Maven Resolver Ant Tasks to 1.6.0. (rjung)

Tenable has extracted the preceding description block directly from the SUSE security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The version of tomcat installed on the remote host is prior to 7.0.76-10. It is, therefore, affected by a vulnerability as referenced in the ALAS2-2026-3204 advisory.

    A flaw was found in Tomcat. An improper input validation vulnerability allows an attacker to bypass     security constraints. Specifically, if a security constraint is configured to permit HEAD requests to a     URI but deny GET requests, a malformed or specification invalid HEAD request using the HTTP/0.9 protocol     can bypass the intended denial rule, enabling an attacker to access resources that should be protected.
    (CVE-2026-24733)

Tenable has extracted the preceding description block directly from the tested product security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The version of tomcat installed on the remote host is prior to 9.0.115-1. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2TOMCAT9-2026-024 advisory.

    mproper Input Validation vulnerability. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.14,     from 10.1.0-M1 through 10.1.49, from 9.0.0-M1 through 9.0.112. The following versions were EOL at the time     the CVE was created but are known to be affected: 8.5.0 through 8.5.100. Older EOL versions are not     affected. Tomcat did not validate that the host name provided via the SNI extension was the same as the     host name provided in the HTTP host header field. If Tomcat was configured with more than one virtual host     and the TLS configuration for one of those hosts did not require client certificate authentication but     another one did, it was possible for a client to bypass the client certificate authentication by sending     different host names in the SNI extension and the HTTP host header field. The vulnerability only applies     if client certificate authentication is only enforced at the Connector. It does not apply if client     certificate authentication is enforced at the web application. Users are recommended to upgrade to version     11.0.15 or later, 10.1.50 or later or 9.0.113 or later, which fix the issue. (CVE-2025-66614)

    A flaw was found in Tomcat. An improper input validation vulnerability allows an attacker to bypass     security constraints. Specifically, if a security constraint is configured to permit HEAD requests to a     URI but deny GET requests, a malformed or specification invalid HEAD request using the HTTP/0.9 protocol     can bypass the intended denial rule, enabling an attacker to access resources that should be protected.
    (CVE-2026-24733)

    Improper Input Validation vulnerability in Apache Tomcat Native, Apache Tomcat.

    When using an OCSP responder, Tomcat Native (and Tomcat's FFM port of the Tomcat Native code) did not     complete verification or freshness checks on the OCSP response which could allow certificate revocation to     be bypassed.

    This issue affects Apache Tomcat Native:  from 1.3.0 through 1.3.4, from 2.0.0 through 2.0.11; Apache     Tomcat: from 11.0.0-M1 through 11.0.17, from 10.1.0-M7 through 10.1.51, from 9.0.83 through 9.0.114.

    The following versions were EOL at the time the CVE was created but areknown to be affected: from 1.1.23     through 1.1.34, from 1.2.0 through 1.2.39. Older EOL versions are not affected.

    Apache Tomcat Native users are recommended to upgrade to versions 1.3.5 or later or 2.0.12 or later, which     fix the issue.

    Apache Tomcat users are recommended to upgrade to versions 11.0.18 or later, 10.1.52 or later or 9.0.115     or later which fix the issue. (CVE-2026-24734)

Tenable has extracted the preceding description block directly from the tested product security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote SUSE Linux SLES12 host has packages installed that are affected by a vulnerability as referenced in the SUSE- SU-2026:0922-1 advisory.

    - CVE-2026-24733: improper input validation on HTTP/0.9 requests (bsc#1258385)

Tenable has extracted the preceding description block directly from the SUSE security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote openSUSE 16 host has packages installed that are affected by multiple vulnerabilities as referenced in the openSUSE-SU-2026:20350-1 advisory.

    Update to Tomcat 9.0.115:

    - CVE-2025-66614: client certificate verification bypass due to virtual host mapping (bsc#1258371).
    - CVE-2026-24733: improper input validation on HTTP/0.9 requests (bsc#1258385).
    - CVE-2026-24734: certificate revocation bypass due to incomplete OCSP verification checks (bsc#1258387).
     * Catalina      + Fix: 69623: Additional fix for the long standing regression that meant      that calls to ClassLoader.getResource().getContent() failed when made from      within a web application with resource caching enabled if the target      resource was packaged in a JAR file. (markt)      + Fix: Pull request #923: Avoid adding multiple CSRF tokens to a URL in the      CsrfPreventionFilter. (schultz)      + Fix: 69918: Ensure request parameters are correctly parsed for HTTP/2      requests when the content-length header is not set. (dsoumis)      + Update: Update the minimum and recommended versions for Tomcat Native to      1.3.4. (markt)      + Add: Add a new ssoReauthenticationMode to the Tomcat provided      Authenticators that provides a per Authenticator override of the SSO Valve      requireReauthentication attribute. (markt)      + Fix: Ensure URL encoding errors in the Rewrite Valve trigger an exception      rather than silently using a replacement character. (markt)      + Fix: 69871: Increase log level to INFO for missing configuration for the      rewrite valve. (remm)      + Fix: Add log warnings for additional Host appBase suspicious values.
     (remm)      + Fix: Remove hard dependency on tomcat-jni.jar for catalina.jar.
     org.apache.catalina.Connector no longer requires      org.apache.tomcat.jni.AprStatus to be present. (markt)      + Add: Add the ability to use a custom function to generate the client      identifier in the CrawlerSessionManagerValve. This is only available      programmatically. Pull request #902 by Brian Matzon. (markt)      + Fix: Change the SSO reauthentication behaviour for SPNEGO authentication      so that a normal SPNEGO authentication is performed if the SSL Valve is      configured with reauthentication enabled. This is so that the delegated      credentials will be available to the web application. (markt)      + Fix: When generating the class path in the Loader, re-order the check on      individual class path components to avoid a potential      NullPointerException. Identified by Coverity Scan. (markt)      + Fix: Fix SSL socket factory configuration in the JNDI realm. Based on pull      request #915 by Joshua Rogers. (remm)      + Update: Add an attribute, digestInRfc3112Order, to      MessageDigestCredentialHandler to control the order in which the      credential and salt are digested. By default, the current, non-RFC 3112      compliant, order of salt then credential will be used. This default will      change in Tomcat 12 to the RFC 3112 compliant order of credential then      salt. (markt)
     * Cluster      + Add: 62814: Document that human-readable names maybe used for      mapSendOptions and align documentation with channelSendOptions. Based on      pull request #929 by archan0621. (markt)
     * Clustering      + Fix: Correct a regression introduced in 9.0.109 that broke some clustering      configurations. (markt)
     * Coyote      + Fix: Prevent concurrent release of OpenSSLEngine resources and the      termination of the Tomcat Native library as it can cause crashes during      Tomcat shutdown. (markt)      + Fix: Avoid possible NPEs when using a TLS enabled custom connector. (remm)      + Fix: Improve warnings when setting ciphers lists in the FFM code,      mirroring the tomcat-native changes. (remm)      + Fix: 69910: Dereference TLS objects right after closing a socket to      improve memory efficiency. (remm)      + Fix: Relax the JSSE vs OpenSSL configuration style checks on SSLHostConfig      to reflect the existing implementation that allows one configuration style      to be used for the trust attributes and a different style for all the      other attributes. (markt)      + Fix: Better warning message when OpenSSLConf configuration elements are      used with a JSSE TLS implementation. (markt)      + Fix: When using OpenSSL via FFM, don't log a warning about missing CA      certificates unless CA certificates were configured and the configuration      failed. (markt)      + Add: For configuration consistency between OpenSSL and JSSE TLS      implementations, TLSv1.3 cipher suites included in the ciphers attribute      of an SSLHostConfig are now always ignored (previously they would be      ignored with OpenSSL implementations and used with JSSE implementations)      and a warning is logged that the cipher suite has been ignored. (markt)      + Add: Add the ciphersuite attribute to SSLHostConfig to configure the      TLSv1.3 cipher suites. (markt)      + Add: Add OCSP support to JSSE based TLS connectors and make the use of      OCSP configurable per connector for both JSSE and OpenSSL based TLS      implementations. Align the checks performed by OpenSSL with those      performed by JSSE. (markt)      + Add: Add support for soft failure of OCSP checks with soft failure support      disabled by default. (markt)      + Add: Add support for configuring the verification flags passed to      OCSP_basic_verify when using an OpenSSL based TLS implementation. (markt)      + Fix: Fix OpenSSL FFM code compatibility with LibreSSL versions below 3.5.
     + Fix: Don't log an incorrect certificate KeyStore location when creating a      TLS connector if the KeyStore instance has been set directly on the      connector. (markt)      + Fix: HTTP/0.9 only allows GET as the HTTP method. (remm)      + Add: Add strictSni attribute on the Connector to allow matching the      SSLHostConfig configuration associated with the SNI host name to the      SSLHostConfig configuration matched from the HTTP protocol host name. Non      matching configurations will cause the request to be rejected. The      attribute default value is true, enabling the matching. (remm)      + Fix: Graceful failure for OCSP on BoringSSL in the FFM code. (remm)      + Fix: 69866: Fix a memory leak when using a trust store with the OpenSSL      provider. Pull request #912 by aogburn. (markt)      + Fix: Fix AJP message length check. Pull request #916 by Joshua Rogers.
     * Jasper      + Fix: 69333: Correct a regression in the previous fix for 69333 and ensure      that reuse() or release() is always called for a tag. (markt)      + Fix: 69877: Catch IllegalArgumentException when processing URIs when      creating the classpath to handle invalid URIs. (remm)      + Fix: Fix populating the classpath with the webapp classloader      repositories. (remm)      + Fix: 69862: Avoid NPE unwrapping Servlet exception which would hide some      exception details. Patch submitted by Eric Blanquer. (remm)
     * Jdbc-pool      + Fix: 64083: If the underlying connection has been closed, don't add it to      the pool when it is returned. Pull request #235 by Alex Panchenko. (markt)
     * Web applications      + Fix: Manager: Fix abrupt truncation of the HTML and JSON complete server      status output if one or more of the web applications failed to start.
     (schultz)      + Add: Manager: Include web application state in the HTML and JSON complete      server status output. (markt)      + Add: Documentation: Expand the documentation to better explain when OCSP      is supported and when it is not. (markt)
     * Websocket      + Fix: 69920: When attempting to write to a closed Writer or OutputStream      obtained from a WebSocket session, throw an IOException rather than an      IllegalStateExcpetion as required by Writer and strongly suggested by      OutputStream. (markt)
     * Other      + Add: Add property gpg.sign.files to optionally disable release artefact      signing with GPG. (rjung)      + Add: Add test.silent property to suppress JUnit console output during test      execution. Useful for cleaner console output when running tests with      multiple threads. (csutherl)      + Update: Update the internal fork of Commons Pool to 2.13.1. (markt)      + Update: Update the internal fork of Commons DBCP to 2.14.0. (markt)      + Update: Update Commons Daemon to 1.5.1. (markt)      + Update: Update ByteBuddy to 1.18.3. (markt)      + Update: Update UnboundID to 7.0.4. (markt)      + Update: Update Checkstyle to 12.3.1. (markt)      + Add: Improvements to French translations. (markt)      + Add: Improvements to Japanese translations provided by tak7iji. (markt)      + Add: Improvements to Chinese translations provided by Yang. vincent.h and      yong hu. (markt)      + Update: Update Tomcat Native to 1.3.5. (markt)      + Add: Add test profile system for selective test execution. Profiles can be      specified via -Dtest.profile=<name> to run specific test subsets without      using patterns directly. Profile patterns are defined in      test-profiles.properties. (csutherl)      + Update: Update file extension to media type mappings to align with the      current list used by the Apache Web Server (httpd). (markt)      + Update: Update Commons Daemon to 1.5.0. (markt)      + Update: Update Byte Buddy to 1.18.2. (markt)      + Update: Update Checkstyle to 12.2.0. (markt)      + Add: Improvements to Spanish translations provided by White Vogel. (markt)      + Add: Improvements to French translations. (remm)      + Update: Update the internal fork of Apache Commons BCEL to 6.11.0. (markt)      + Update: Update to Byte Buddy 1.17.8. (markt)      + Update: Update to Checkstyle 12.1.1. (markt)      + Update: Update to Jacoco 0.8.14. (markt)      + Update: Update to SpotBugs 4.9.8. (markt)      + Update: Update to JSign 7.4. (markt)      + Update: Update Maven Resolver Ant Tasks to 1.6.0. (rjung)

Tenable has extracted the preceding description block directly from the SUSE security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote SUSE Linux SLES15 / SLES_SAP15 / openSUSE 15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2026:0890-1 advisory.

    Update to Tomcat 10.1.52:

    - CVE-2025-66614: client certificate verification bypass due to virtual host mapping (bsc#1258371).
    - CVE-2026-24733: improper input validation on HTTP/0.9 requests (bsc#1258385).
    - CVE-2026-24734: certificate revocation bypass due to incomplete OCSP verification checks (bsc#1258387).

    Changelog:

     * Catalina      + Fix: 69623: Additional fix for the long standing regression that meant      that calls to ClassLoader.getResource().getContent() failed when made from      within a web application with resource caching enabled if the target      resource was packaged in a JAR file. (markt)      + Fix: Pull request #923: Avoid adding multiple CSRF tokens to a URL in the      CsrfPreventionFilter. (schultz)      + Fix: 69918: Ensure request parameters are correctly parsed for HTTP/2      requests when the content-length header is not set. (dsoumis)      + Update: Enable minimum and recommended Tomcat Native versions to be set      separately for Tomcat Native 1.x and 2.x. Update the minimum and      recommended versions for Tomcat Native 1.x to 1.3.4. Update the minimum      and recommended versions for Tomcat Native 2.x to 2.0.12. (markt)      + Add: Add a new ssoReauthenticationMode to the Tomcat provided      Authenticators that provides a per Authenticator override of the SSO Valve      requireReauthentication attribute. (markt)      + Fix: Ensure URL encoding errors in the Rewrite Valve trigger an exception      rather than silently using a replacement character. (markt)      + Fix: 69932: Fix request end access log pattern regression, which would log      the start time of the request instead. (remm)      + Fix: 69871: Increase log level to INFO for missing configuration for the      rewrite valve. (remm)      + Fix: Add log warnings for additional Host appBase suspicious values.
     (remm)      + Fix: Remove hard dependency on tomcat-jni.jar for catalina.jar.
     org.apache.catalina.Connector no longer requires      org.apache.tomcat.jni.AprStatus to be present. (markt)      + Add: Add the ability to use a custom function to generate the client      identifier in the CrawlerSessionManagerValve. This is only available      programmatically. Pull request #902 by Brian Matzon. (markt)      + Fix: Change the SSO reauthentication behaviour for SPNEGO authentication      so that a normal SPNEGO authentication is performed if the SSL Valve is      configured with reauthentication enabled. This is so that the delegated      credentials will be available to the web application. (markt)      + Fix: When generating the class path in the Loader, re-order the check on      individual class path components to avoid a potential      NullPointerException. Identified by Coverity Scan. (markt)      + Fix: Fix SSL socket factory configuration in the JNDI realm. Based on pull      request #915 by Joshua Rogers. (remm)      + Update: Add an attribute, digestInRfc3112Order, to      MessageDigestCredentialHandler to control the order in which the      credential and salt are digested. By default, the current, non-RFC 3112      compliant, order of salt then credential will be used. This default will      change in Tomcat 12 to the RFC 3112 compliant order of credential then      salt. (markt)      + Fix: Log warnings when the SSO configuration does not comply with the      documentation. (remm)      + Update: Deprecate the RemoteAddrFilter and RemoteAddrValve in favour of      the RemoteCIDRFilter and RemoteCIDRValve. (markt)      + Fix: 69837: Fix corruption of the class path generated by the Loader when      running on Windows. (markt)      + Fix: Reject requests that map to invalid Windows file names earlier.
     (markt)      + Fix: 69839: Ensure that changes to session IDs (typically after      authentication) are promulgated to the SSO Valve to ensure that SSO      entries are fully clean-up on session expiration. Patch provided by Kim      Johan Andersson. (markt)      + Fix: Fix a race condition in the creation of the storage location for the      FileStore. (markt)
     * Cluster      + Add: 62814: Document that human-readable names may be used for      mapSendOptions and align documentation with channelSendOptions. Based on      pull request #929 by archan0621. (markt)
     * Clustering      + Fix: Correct a regression introduced in 10.1.45 that broke some clustering      configurations. (markt)
     * Coyote      + Fix: 69936: Fix bug in previous fix for Tomcat Native crashes on shutdown      that triggered a significant memory leak. Patch provided by Wes. (markt)      + Fix: Avoid possible NPEs when using a TLS enabled custom connector. (remm)      + Fix: Improve warnings when setting ciphers lists in the FFM code,      mirroring the tomcat-native changes. (remm)      + Fix: 69910: Dereference TLS objects right after closing a socket to      improve memory efficiency. (remm)      + Fix: Relax the JSSE vs OpenSSL configuration style checks on SSLHostConfig      to reflect the existing implementation that allows one configuration style      to be used for the trust attributes and a different style for all the      other attributes. (markt)      + Fix: Better warning message when OpenSSLConf configuration elements are      used with a JSSE TLS implementation. (markt)      + Fix: When using OpenSSL via FFM, don't log a warning about missing CA      certificates unless CA certificates were configured and the configuration      failed. (markt)      + Add: For configuration consistency between OpenSSL and JSSE TLS      implementations, TLSv1.3 cipher suites included in the ciphers attribute      of an SSLHostConfig are now always ignored (previously they would be      ignored with OpenSSL implementations and used with JSSE implementations)      and a warning is logged that the cipher suite has been ignored. (markt)      + Add: Add the ciphersuite attribute to SSLHostConfig to configure the      TLSv1.3 cipher suites. (markt)      + Add: Add OCSP support to JSSE based TLS connectors and make the use of      OCSP configurable per connector for both JSSE and OpenSSL based TLS      implementations. Align the checks performed by OpenSSL with those      performed by JSSE. (markt)      + Add: Add support for soft failure of OCSP checks with soft failure support      disabled by default. (markt)      + Add: Add support for configuring the verification flags passed to      OCSP_basic_verify when using an OpenSSL based TLS implementation. (markt)      + Fix: Fix OpenSSL FFM code compatibility with LibreSSL versions below 3.5.
     + Fix: Prevent concurrent release of OpenSSLEngine resources and the      termination of the Tomcat Native library as it can cause crashes during      Tomcat shutdown. (markt)      + Fix: Don't log an incorrect certificate KeyStore location when creating a      TLS connector if the KeyStore instance has been set directly on the      connector. (markt)      + Fix: HTTP/0.9 only allows GET as the HTTP method. (remm)      + Add: Add strictSni attribute on the Connector to allow matching the      SSLHostConfig configuration associated with the SNI host name to the      SSLHostConfig configuration matched from the HTTP protocol host name. Non      matching configurations will cause the request to be rejected. The      attribute default value is true, enabling the matching. (remm)      + Fix: Graceful failure for OCSP on BoringSSL in the FFM code. (remm)      + Fix: Fix use of deferAccept attribute in JMX, since it is normally only      removed in Tomcat 11. (remm)      + Fix: 69866: Fix a memory leak when using a trust store with the OpenSSL      provider. Pull request #912 by aogburn. (markt)      + Fix: Fix potential crash on shutdown when a Connector depends on the      Tomcat Native library. (markt)      + Fix: Fix AJP message length check. Pull request #916 by Joshua Rogers.
     + Fix: 69848: Fix copy/paste errors in 10.1.47 that meant DELETE requests      received via the AJP connector were processed as OPTIONS requests and      PROPFIND requests were processed as TRACE. (markt)      + Fix: Various OCSP processing issues in the OpenSSL FFM code. (dsoumis)
     * General      + Add: Add test.silent property to suppress JUnit console output during test      execution. Useful for cleaner console output when running tests with      multiple threads. (csutherl)
     * Jasper      + Fix: 69333: Correct a regression in the previous fix for 69333 and ensure      that reuse() or release() is always called for a tag. (markt)      + Fix: 69877: Catch IllegalArgumentException when processing URIs when      creating the classpath to handle invalid URIs. (remm)      + Fix: Fix populating the classpath with the webapp classloader      repositories. (remm)      + Fix: 69862: Avoid NPE unwrapping Servlet exception which would hide some      exception details. Patch submitted by Eric Blanquer. (remm)
     * Jdbc-pool      + Fix: 64083: If the underlying connection has been closed, don't add it to      the pool when it is returned. Pull request #235 by Alex Panchenko. (markt)
     * Web applications      + Fix: Manager: Fix abrupt truncation of the HTML and JSON complete server      status output if one or more of the web applications failed to start.
     (schultz)      + Add: Manager: Include web application state in the HTML and JSON complete      server status output. (markt)      + Add: Documentation: Expand the documentation to better explain when OCSP      is supported and when it is not. (markt)
     * Websocket      + Fix: 69920: When attempting to write to a closed Writer or OutputStream      obtained from a WebSocket session, throw an IOException rather than an      IllegalStateExcpetion as required by Writer and strongly suggested by      OutputStream. (markt)      + Fix: 69845: When using permessage-deflate with Java 25 onwards, handle the      underlying Inflater and/or Deflater throwing IllegalStateException when      closed rather than NullPointerException as they do in Java 24 and earlier.
     * Other      + Update: Update the internal fork of Commons Pool to 2.13.1. (markt)      + Update: Update the internal fork of Commons DBCP to 2.14.0. (markt)      + Update: Update Commons Daemon to 1.5.1. (markt)      + Update: Update ByteBuddy to 1.18.3. (markt)      + Update: Update UnboundID to 7.0.4. (markt)      + Update: Update Checkstyle to 12.3.1. (markt)      + Add: Improvements to French translations. (markt)      + Add: Improvements to Japanese translations provided by tak7iji. (markt)      + Add: Improvements to Chinese translations provided by Yang. vincent.h and      yong hu. (markt)      + Update: Update Tomcat Native to 2.0.12. (markt)      + Add: Add property 'gpg.sign.files' to optionally disable release artefact      signing with GPG. (rjung)      + Add: Add test profile system for selective test execution. Profiles can be      specified via -Dtest.profile=<name> to run specific test subsets without      using patterns directly. Profile patterns are defined in      test-profiles.properties. (csutherl)      + Update: Update file extension to media type mappings to align with the      current list used by the Apache Web Server (httpd). (markt)      + Update: Update the packaged version of the Tomcat Migration Tool for      Jakarta EE to 1.0.10. (markt)      + Update: Update Commons Daemon to 1.5.0. (markt)      + Update: Update Byte Buddy to 1.18.2. (markt)      + Update: Update Checkstyle to 12.2.0. (markt)      + Add: Improvements to Spanish translations provided by White Vogel. (markt)      + Add: Improvements to French translations. (remm)      + Update: Update the internal fork of Apache Commons BCEL to 6.11.0. (markt)      + Update: Update to Byte Buddy 1.17.8. (markt)      + Update: Update to Checkstyle 12.1.1. (markt)      + Update: Update to Jacoco 0.8.14. (markt)      + Update: Update to SpotBugs 4.9.8. (markt)      + Update: Update to JSign 7.4. (markt)      + Update: Update Maven Resolver Ant Tasks to 1.6.0. (rjung)

Tenable has extracted the preceding description block directly from the SUSE security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote SUSE Linux SLES15 / SLES_SAP15 / openSUSE 15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2026:0877-1 advisory.

    Update to Tomcat 11.0.18:

    - CVE-2025-66614: client certificate verification bypass due to virtual host mapping (bsc#1258371).
    - CVE-2026-24733: improper input validation on HTTP/0.9 requests (bsc#1258385).
    - CVE-2026-24734: certificate revocation bypass due to incomplete OCSP verification checks (bsc#1258387).

    Changelog:

     * Catalina      + Fix: 69932: Fix request end access log pattern regression, which would log      the start time of the request instead. (remm)      + Fix: 69623: Additional fix for the long standing regression that meant      that calls to ClassLoader.getResource().getContent() failed when made from      within a web application with resource caching enabled if the target      resource was packaged in a JAR file. (markt)      + Fix: Pull request #923: Avoid adding multiple CSRF tokens to a URL in the      CsrfPreventionFilter. (schultz)      + Fix: 69918: Ensure request parameters are correctly parsed for HTTP/2      requests when the content-length header is not set. (dsoumis)      + Update: Enable minimum and recommended Tomcat Native versions to be set      separately for Tomcat Native 1.x and 2.x. Update the minimum and      recommended versions for Tomcat Native 1.x to 1.3.4. Update the minimum      and recommended versions for Tomcat Native 2.x to 2.0.12. (markt)      + Add: Add a new ssoReauthenticationMode to the Tomcat provided      Authenticators that provides a per Authenticator override of the SSO Valve      requireReauthentication attribute. (markt)      + Fix: Ensure URL encoding errors in the Rewrite Valve trigger an exception      rather than silently using a replacement character. (markt)      + Fix: 69871: Increase log level to INFO for missing configuration for the      rewrite valve. (remm)      + Fix: Add log warnings for additional Host appBase suspicious values.
     (remm)      + Fix: Remove hard dependency on tomcat-jni.jar for catalina.jar.
     org.apache.catalina.Connector no longer requires      org.apache.tomcat.jni.AprStatus to be present. (markt)      + Add: Add the ability to use a custom function to generate the client      identifier in the CrawlerSessionManagerValve. This is only available      programmatically. Pull request #902 by Brian Matzon. (markt)      + Fix: Change the SSO reauthentication behaviour for SPNEGO authentication      so that a normal SPNEGO authentication is performed if the SSL Valve is      configured with reauthentication enabled. This is so that the delegated      credentials will be available to the web application. (markt)      + Fix: When generating the class path in the Loader, re-order the check on      individual class path components to avoid a potential      NullPointerException. Identified by Coverity Scan. (markt)      + Fix: Fix SSL socket factory configuration in the JNDI realm. Based on pull      request #915 by Joshua Rogers. (remm)      + Update: Add an attribute, digestInRfc3112Order, to      MessageDigestCredentialHandler to control the order in which the      credential and salt are digested. By default, the current, non-RFC 3112      compliant, order of salt then credential will be used. This default will      change in Tomcat 12 to the RFC 3112 compliant order of credential then      salt. (markt)
     * Cluster      + Add: 62814: Document that human-readable names may be used for      mapSendOptions and align documentation with channelSendOptions. Based on      pull request #929 by archan0621. (markt)
     * Clustering      + Fix: Correct a regression introduced in 11.0.11 that broke some clustering      configurations. (markt)
     * Coyote      + Fix: 69936: Fix bug in previous fix for Tomcat Native crashes on shutdown      that triggered a significant memory leak. Patch provided by Wes. (markt)      + Fix: Prevent concurrent release of OpenSSLEngine resources and the      termination of the Tomcat Native library as it can cause crashes during      Tomcat shutdown. (markt)      + Fix: Improve warnings when setting ciphers lists in the FFM code,      mirroring the tomcat-native changes. (remm)      + Fix: 69910: Dereference TLS objects right after closing a socket to      improve memory efficiency. (remm)      + Fix: Relax the JSSE vs OpenSSL configuration style checks on SSLHostConfig      to reflect the existing implementation that allows one configuration style      to be used for the trust attributes and a different style for all the      other attributes. (markt)      + Fix: Better warning message when OpenSSLConf configuration elements are      used with a JSSE TLS implementation. (markt)      + Fix: When using OpenSSL via FFM, don't log a warning about missing CA      certificates unless CA certificates were configured and the configuration      failed. (markt)      + Add: For configuration consistency between OpenSSL and JSSE TLS      implementations, TLSv1.3 cipher suites included in the ciphers attribute      of an SSLHostConfig are now always ignored (previously they would be      ignored with OpenSSL implementations and used with JSSE implementations)      and a warning is logged that the cipher suite has been ignored. (markt)      + Add: Add the ciphersuite attribute to SSLHostConfig to configure the      TLSv1.3 cipher suites. (markt)      + Add: Add OCSP support to JSSE based TLS connectors and make the use of      OCSP configurable per connector for both JSSE and OpenSSL based TLS      implementations. Align the checks performed by OpenSSL with those      performed by JSSE. (markt)      + Add: Add support for soft failure of OCSP checks with soft failure support      disabled by default. (markt)      + Add: Add support for configuring the verification flags passed to      OCSP_basic_verify when using an OpenSSL based TLS implementation. (markt)      + Fix: Fix OpenSSL FFM code compatibility with LibreSSL versions below 3.5.
     + Fix: Don't log an incorrect certificate KeyStore location when creating a      TLS connector if the KeyStore instance has been set directly on the      connector. (markt)      + Fix: HTTP/0.9 only allows GET as the HTTP method. (remm)      + Add: Add strictSni attribute on the Connector to allow matching the      SSLHostConfig configuration associated with the SNI host name to the      SSLHostConfig configuration matched from the HTTP protocol host name. Non      matching configurations will cause the request to be rejected. The      attribute default value is true, enabling the matching. (remm)      + Fix: Graceful failure for OCSP on BoringSSL in the FFM code. (remm)      + Fix: 69866: Fix a memory leak when using a trust store with the OpenSSL      provider. Pull request #912 by aogburn. (markt)      + Fix: Fix potential crash on shutdown when a Connector depends on the      Tomcat Native library. (markt)      + Fix: Fix AJP message length check. Pull request #916 by Joshua Rogers.
     * Jasper      + Fix: 69333: Correct a regression in the previous fix for 69333 and ensure      that reuse() or release() is always called for a tag. (markt)      + Fix: 69877: Catch IllegalArgumentException when processing URIs when      creating the classpath to handle invalid URIs. (remm)      + Fix: Fix populating the classpath with the webapp classloader      repositories. (remm)      + Fix: 69862: Avoid NPE unwrapping Servlet exception which would hide some      exception details. Patch submitted by Eric Blanquer. (remm)
     * Jdbc-pool      + Fix: 64083: If the underlying connection has been closed, don't add it to      the pool when it is returned. Pull request #235 by Alex Panchenko. (markt)
     * Web applications      + Fix: Manager: Fix abrupt truncation of the HTML and JSON complete server      status output if one or more of the web applications failed to start.
     (schultz)      + Add: Manager: Include web application state in the HTML and JSON complete      server status output. (markt)      + Add: Documentation: Expand the documentation to better explain when OCSP      is supported and when it is not. (markt)
     * Websocket      + Fix: 69920: When attempting to write to a closed Writer or OutputStream      obtained from a WebSocket session, throw an IOException rather than an      IllegalStateExcpetion as required by Writer and strongly suggested by      OutputStream. (markt)
     * Other      + Add: Add property 'gpg.sign.files' to optionally disable release artefact      signing with GPG. (rjung)      + Add: Add test.silent property to suppress JUnit console output during test      execution. Useful for cleaner console output when running tests with      multiple threads. (csutherl)      + Update: Update the internal fork of Commons Pool to 2.13.1. (markt)      + Update: Update the internal fork of Commons DBCP to 2.14.0. (markt)      + Update: Update Commons Daemon to 1.5.1. (markt)      + Update: Update to the Eclipse JDT compiler 4.37. (markt)      + Update: Update ByteBuddy to 1.18.3. (markt)      + Update: Update UnboundID to 7.0.4. (markt)      + Update: Update Checkstyle to 12.3.1. (markt)      + Add: Improvements to French translations. (markt)      + Add: Improvements to Japanese translations provided by tak7iji. (markt)      + Add: Improvements to Chinese translations provided by Yang. vincent.h and      yong hu. (markt)      + Update: Update Tomcat Native to 2.0.12. (markt)      + Add: Add test profile system for selective test execution. Profiles can be      specified via -Dtest.profile=<name> to run specific test subsets without      using patterns directly. Profile patterns are defined in      test-profiles.properties. (csutherl)      + Update: Update file extension to media type mappings to align with the      current list used by the Apache Web Server (httpd). (markt)      + Update: Update the packaged version of the Tomcat Migration Tool for      Jakarta EE to 1.0.10. (markt)      + Update: Update Commons Daemon to 1.5.0. (markt)      + Update: Update Byte Buddy to 1.18.2. (markt)      + Update: Update Checkstyle to 12.2.0. (markt)      + Add: Improvements to Spanish translations provided by White Vogel. (markt)      + Add: Improvements to French translations. (remm)      + Update: Update the internal fork of Apache Commons BCEL to 6.11.0. (markt)      + Update: Update to Byte Buddy 1.17.8. (markt)      + Update: Update to Checkstyle 12.1.1. (markt)      + Update: Update to Jacoco 0.8.14. (markt)      + Update: Update to SpotBugs 4.9.8. (markt)      + Update: Update to JSign 7.4. (markt)      + Update: Update Maven Resolver Ant Tasks to 1.6.0. (rjung)

Tenable has extracted the preceding description block directly from the SUSE security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The version of Apache Tomcat installed on the remote host is 9.0.0-M1 prior to 9.0.113, 10.1.0-M1 prior to 10.1.50 or 11.0.0-M1 prior to 11.0.15. It is, therefore, affected by multiple vulnerabilities :

 - If a security constraint was configured to allow HEAD requests to a URI but deny GET requests, the user could bypass that constraint on GET requests by sending a (specification invalid) HEAD request using HTTP/0.9. (CVE-2026-24733)

 - If Tomcat was configured with more than one virtual host and the TLS configuration for one of those hosts did not require client certificate authentication but another one did, it was possible for a client to bypass the client certificate authentication by sending different host names in the SNI extension and the HTTP host header field. (CVE-2025-66614)

Note that the scanner has not attempted to exploit these issues but has instead relied only on the application's self-reported version number.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - Improper Input Validation vulnerability in Apache Tomcat. Tomcat did not limit HTTP/0.9 requests to the     GET method. If a security constraint was configured to allow HEAD requests to a URI but deny GET requests,     the user could bypass that constraint on GET requests by sending a (specification invalid) HEAD request     using HTTP/0.9. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.14, from 10.1.0-M1 through     10.1.49, from 9.0.0.M1 through 9.0.112. Older, EOL versions are also affected. Users are recommended to     upgrade to version 11.0.15 or later, 10.1.50 or later or 9.0.113 or later, which fixes the issue.
    (CVE-2026-24733)

Note that Nessus relies on the presence of the package as reported by the vendor.

The version of Tomcat installed on the remote host is prior to 11.0.15. It is, therefore, affected by multiple vulnerabilities as referenced in the fixed_in_apache_tomcat_11.0.15_security-11 advisory.

  - Improper Input Validation vulnerability. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.14,     from 10.1.0-M1 through 10.1.49, from 9.0.0-M1 through 9.0.112. The following versions were EOL at the time     the CVE was created but are known to be affected: 8.5.0 through 8.5.100. Older EOL versions are not     affected. Tomcat did not validate that the host name provided via the SNI extension was the same as the     host name provided in the HTTP host header field. If Tomcat was configured with more than one virtual host     and the TLS configuration for one of those hosts did not require client certificate authentication but     another one did, it was possible for a client to bypass the client certificate authentication by sending     different host names in the SNI extension and the HTTP host header field. The vulnerability only applies     if client certificate authentication is only enforced at the Connector. It does not apply if client     certificate authentication is enforced at the web application. Users are recommended to upgrade to version     11.0.15 or later, 10.1.50 or later or 9.0.113 or later, which fix the issue. (CVE-2025-66614)

  - Improper Input Validation vulnerability in Apache Tomcat. Tomcat did not limit HTTP/0.9 requests to the     GET method. If a security constraint was configured to allow HEAD requests to a URI but deny GET requests,     the user could bypass that constraint on GET requests by sending a (specification invalid) HEAD request     using HTTP/0.9. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.14, from 10.1.0-M1 through     10.1.49, from 9.0.0.M1 through 9.0.112. Older, EOL versions are also affected. Users are recommended to     upgrade to version 11.0.15 or later, 10.1.50 or later or 9.0.113 or later, which fixes the issue.
    (CVE-2026-24733)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The version of Tomcat installed on the remote host is prior to 10.1.50. It is, therefore, affected by multiple vulnerabilities as referenced in the fixed_in_apache_tomcat_10.1.50_security-10 advisory.

  - Improper Input Validation vulnerability. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.14,     from 10.1.0-M1 through 10.1.49, from 9.0.0-M1 through 9.0.112. The following versions were EOL at the time     the CVE was created but are known to be affected: 8.5.0 through 8.5.100. Older EOL versions are not     affected. Tomcat did not validate that the host name provided via the SNI extension was the same as the     host name provided in the HTTP host header field. If Tomcat was configured with more than one virtual host     and the TLS configuration for one of those hosts did not require client certificate authentication but     another one did, it was possible for a client to bypass the client certificate authentication by sending     different host names in the SNI extension and the HTTP host header field. The vulnerability only applies     if client certificate authentication is only enforced at the Connector. It does not apply if client     certificate authentication is enforced at the web application. Users are recommended to upgrade to version     11.0.15 or later, 10.1.50 or later or 9.0.113 or later, which fix the issue. (CVE-2025-66614)

  - Improper Input Validation vulnerability in Apache Tomcat. Tomcat did not limit HTTP/0.9 requests to the     GET method. If a security constraint was configured to allow HEAD requests to a URI but deny GET requests,     the user could bypass that constraint on GET requests by sending a (specification invalid) HEAD request     using HTTP/0.9. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.14, from 10.1.0-M1 through     10.1.49, from 9.0.0.M1 through 9.0.112. Older, EOL versions are also affected. Users are recommended to     upgrade to version 11.0.15 or later, 10.1.50 or later or 9.0.113 or later, which fixes the issue.
    (CVE-2026-24733)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The version of Tomcat installed on the remote host is prior to 9.0.113. It is, therefore, affected by multiple vulnerabilities as referenced in the fixed_in_apache_tomcat_9.0.113_security-9 advisory.

  - Improper Input Validation vulnerability. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.14,     from 10.1.0-M1 through 10.1.49, from 9.0.0-M1 through 9.0.112. The following versions were EOL at the time     the CVE was created but are known to be affected: 8.5.0 through 8.5.100. Older EOL versions are not     affected. Tomcat did not validate that the host name provided via the SNI extension was the same as the     host name provided in the HTTP host header field. If Tomcat was configured with more than one virtual host     and the TLS configuration for one of those hosts did not require client certificate authentication but     another one did, it was possible for a client to bypass the client certificate authentication by sending     different host names in the SNI extension and the HTTP host header field. The vulnerability only applies     if client certificate authentication is only enforced at the Connector. It does not apply if client     certificate authentication is enforced at the web application. Users are recommended to upgrade to version     11.0.15 or later, 10.1.50 or later or 9.0.113 or later, which fix the issue. (CVE-2025-66614)

  - Improper Input Validation vulnerability in Apache Tomcat. Tomcat did not limit HTTP/0.9 requests to the     GET method. If a security constraint was configured to allow HEAD requests to a URI but deny GET requests,     the user could bypass that constraint on GET requests by sending a (specification invalid) HEAD request     using HTTP/0.9. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.14, from 10.1.0-M1 through     10.1.49, from 9.0.0.M1 through 9.0.112. Older, EOL versions are also affected. Users are recommended to     upgrade to version 11.0.15 or later, 10.1.50 or later or 9.0.113 or later, which fixes the issue.
    (CVE-2026-24733)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

ID	Name	Product	Family	Severity
303144	SUSE SLES15 / openSUSE 15 Security Update : tomcat (SUSE-SU-2026:0932-1)	Nessus	SuSE Local Security Checks	medium
303098	Amazon Linux 2 : tomcat, --advisory ALAS2-2026-3204 (ALAS-2026-3204)	Nessus	Amazon Linux Local Security Checks	medium
303081	Amazon Linux 2 : tomcat, --advisory ALAS2TOMCAT9-2026-024 (ALASTOMCAT9-2026-024)	Nessus	Amazon Linux Local Security Checks	medium
303015	SUSE SLES12 Security Update : tomcat (SUSE-SU-2026:0922-1)	Nessus	SuSE Local Security Checks	medium
302339	openSUSE 16 Security Update : tomcat (openSUSE-SU-2026:20350-1)	Nessus	SuSE Local Security Checks	medium
302254	SUSE SLES15 / openSUSE 15 Security Update : tomcat10 (SUSE-SU-2026:0890-1)	Nessus	SuSE Local Security Checks	medium
302104	SUSE SLES15 / openSUSE 15 Security Update : tomcat11 (SUSE-SU-2026:0877-1)	Nessus	SuSE Local Security Checks	medium
115154	Apache Tomcat 9.0.0-M1 < 9.0.113 Multiple Vulnerabilities	Web App Scanning	Component Vulnerability	medium
115153	Apache Tomcat 10.1.0-M1 < 10.1.50 Multiple Vulnerabilities	Web App Scanning	Component Vulnerability	medium
115152	Apache Tomcat 11.0.0-M1 < 11.0.15 Multiple Vulnerabilities	Web App Scanning	Component Vulnerability	medium
299445	Linux Distros Unpatched Vulnerability : CVE-2026-24733	Nessus	Misc.	low
299403	Apache Tomcat 11.0.0.M1 < 11.0.15 multiple vulnerabilities	Nessus	Web Servers	critical
299401	Apache Tomcat 10.1.0.M1 < 10.1.50 multiple vulnerabilities	Nessus	Web Servers	critical
299397	Apache Tomcat 9.0.0.M1 < 9.0.113 multiple vulnerabilities	Nessus	Web Servers	critical

Detections

Analytics

CVE-2026-24733

medium

Tenable Plugins

medium

medium

medium

medium

medium

medium

medium

medium

medium

medium

low

critical

critical

critical