Insufficient Session Expiration vulnerability in Apache Tomcat meant that if the session ID for an authenticated HTTP session was changed after a WebSocket connection had been established under that authenticated HTTP session, the WebSokcet session would not be closed as required by the Jakarta WebSocket specification when the HTTP session ended. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.24, from 10.1.0-M1 through 10.1.57, from 9.0.0.M1 through 9.0.120. The following versions were EOL at the time the CVE was created but are known to be affected: from 8.5.0 through 8.5.100, from 7.0.43 through 7.0.109. Other unsupported versions may also be affected. Users are recommended to upgrade to version 11.0.25, 10.1.58 or 9.0.121, which fix the issue.

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

  - Insufficient Session Expiration vulnerability in Apache Tomcat meant that if the session ID for an     authenticated HTTP session was changed after a WebSocket connection had been established under that     authenticated HTTP session, the WebSokcet session would not be closed as required by the Jakarta WebSocket     specification when the HTTP session ended. This issue affects Apache Tomcat: from 11.0.0-M1 through     11.0.24, from 10.1.0-M1 through 10.1.57, from 9.0.0.M1 through 9.0.120. The following versions were EOL at     the time the CVE was created but are known to be affected: from 8.5.0 through 8.5.100, from 7.0.43 through     7.0.109. Other unsupported versions may also be affected. Users are recommended to upgrade to version     11.0.25, 10.1.58 or 9.0.121, which fix the issue. (CVE-2026-73180)

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 10.1.59. It is, therefore, affected by multiple vulnerabilities as referenced in the fixed_in_apache_tomcat_10.1.59_security-10 advisory.

  - Uncontrolled Resource Consumption vulnerability in Apache Tomcat's WebSocket chat example. This issue     affects Apache Tomcat: from 11.0.0-M20 through 11.0.24, from 10.1.24 through 10.1.57, from 9.0.89 through     9.0.120. Users who have followed the security guidance to remove the examples web application are not     affected by this issue. Users are recommended to remove the examples web application or to upgrade to     version 11.0.25, 10.1.58 or 9.0.121 (when released), which fix the issue. (CVE-2026-66299)

  - Insufficient Session Expiration vulnerability in Apache Tomcat meant that if the session ID for an     authenticated HTTP session was changed after a WebSocket connection had been established under that     authenticated HTTP session, the WebSokcet session would not be closed as required by the Jakarta WebSocket     specification when the HTTP session ended. This issue affects Apache Tomcat: from 11.0.0-M1 through     11.0.24, from 10.1.0-M1 through 10.1.57, from 9.0.0.M1 through 9.0.120. The following versions were EOL at     the time the CVE was created but are known to be affected: from 8.5.0 through 8.5.100, from 7.0.43 through     7.0.109. Other unsupported versions may also be affected. Users are recommended to upgrade to version     11.0.25, 10.1.58 or 9.0.121, which fix the issue. (CVE-2026-73180)

  - Uncontrolled Resource Consumption vulnerability in Apache Tomcat via an allocation leak in the HTTP/2     backlog tracking when a stream is reset This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.24,     from 10.1.0-M1 through 10.1.57, from 9.0.39 through 9.0.120. The following versions were EOL at the time     the CVE was created but are known to be affected: from 8.5.59 through 8.5.100. Other unsupported versions     may also be affected. Users are recommended to upgrade to version 11.0.25, 10.1.58 or 9.0.121, which fix     the issue. (CVE-2026-68763)

  - Improper Authentication vulnerability in Apache Tomcat meant that in some circumstances (e.g. CLIENT-CERT,     SPNEGO) that a user would be authenticated even if the user did not exist in the DataSourceRealm. This     issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.24, from 10.1.0-M1 through 10.1.57, from 9.0.0.M1     through 9.0.120. The following versions were EOL at the time the CVE was created but are known to be     affected: from 8.5.0 through 8.5.100, from 7.0.0 through 7.0.109. Other unsupported versions may also be     affected. Users are recommended to upgrade to version 11.0.25, 10.1.58 or 9.0.121, which fix the issue.
    (CVE-2026-68569)

  - Incorrect Authorization vulnerability in Apache Tomcat's FORM authentication process allows the bypassing     of a security constraint that limits user has access to a resource POST but not GET. This issue affects     Apache Tomcat: from 11.0.0-M1 through 11.0.24, from 10.1.0-M1 through 10.1.57, from 9.0.0.M1 through     9.0.120. The following versions were EOL at the time the CVE was created but are known to be affected:
    from 8.5.0 through 8.5.100, from 7.0.0 through 7.0.109. Other unsupported versions may also be affected.
    Users are recommended to upgrade to version 11.0.25, 10.1.58 or 9.0.121, which fixes the issue.
    (CVE-2026-68525)

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 9.0.121. It is, therefore, affected by multiple vulnerabilities as referenced in the fixed_in_apache_tomcat_9.0.121_security-9 advisory.

  - Uncontrolled Resource Consumption vulnerability in Apache Tomcat's WebSocket chat example. This issue     affects Apache Tomcat: from 11.0.0-M20 through 11.0.24, from 10.1.24 through 10.1.57, from 9.0.89 through     9.0.120. Users who have followed the security guidance to remove the examples web application are not     affected by this issue. Users are recommended to remove the examples web application or to upgrade to     version 11.0.25, 10.1.58 or 9.0.121 (when released), which fix the issue. (CVE-2026-66299)

  - Insufficient Session Expiration vulnerability in Apache Tomcat meant that if the session ID for an     authenticated HTTP session was changed after a WebSocket connection had been established under that     authenticated HTTP session, the WebSokcet session would not be closed as required by the Jakarta WebSocket     specification when the HTTP session ended. This issue affects Apache Tomcat: from 11.0.0-M1 through     11.0.24, from 10.1.0-M1 through 10.1.57, from 9.0.0.M1 through 9.0.120. The following versions were EOL at     the time the CVE was created but are known to be affected: from 8.5.0 through 8.5.100, from 7.0.43 through     7.0.109. Other unsupported versions may also be affected. Users are recommended to upgrade to version     11.0.25, 10.1.58 or 9.0.121, which fix the issue. (CVE-2026-73180)

  - Uncontrolled Resource Consumption vulnerability in Apache Tomcat via an allocation leak in the HTTP/2     backlog tracking when a stream is reset This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.24,     from 10.1.0-M1 through 10.1.57, from 9.0.39 through 9.0.120. The following versions were EOL at the time     the CVE was created but are known to be affected: from 8.5.59 through 8.5.100. Other unsupported versions     may also be affected. Users are recommended to upgrade to version 11.0.25, 10.1.58 or 9.0.121, which fix     the issue. (CVE-2026-68763)

  - Improper Authentication vulnerability in Apache Tomcat meant that in some circumstances (e.g. CLIENT-CERT,     SPNEGO) that a user would be authenticated even if the user did not exist in the DataSourceRealm. This     issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.24, from 10.1.0-M1 through 10.1.57, from 9.0.0.M1     through 9.0.120. The following versions were EOL at the time the CVE was created but are known to be     affected: from 8.5.0 through 8.5.100, from 7.0.0 through 7.0.109. Other unsupported versions may also be     affected. Users are recommended to upgrade to version 11.0.25, 10.1.58 or 9.0.121, which fix the issue.
    (CVE-2026-68569)

  - Incorrect Authorization vulnerability in Apache Tomcat's FORM authentication process allows the bypassing     of a security constraint that limits user has access to a resource POST but not GET. This issue affects     Apache Tomcat: from 11.0.0-M1 through 11.0.24, from 10.1.0-M1 through 10.1.57, from 9.0.0.M1 through     9.0.120. The following versions were EOL at the time the CVE was created but are known to be affected:
    from 8.5.0 through 8.5.100, from 7.0.0 through 7.0.109. Other unsupported versions may also be affected.
    Users are recommended to upgrade to version 11.0.25, 10.1.58 or 9.0.121, which fixes the issue.
    (CVE-2026-68525)

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 11.0.25. It is, therefore, affected by multiple vulnerabilities as referenced in the fixed_in_apache_tomcat_11.0.25_security-11 advisory.

  - Uncontrolled Resource Consumption vulnerability in Apache Tomcat's WebSocket chat example. This issue     affects Apache Tomcat: from 11.0.0-M20 through 11.0.24, from 10.1.24 through 10.1.57, from 9.0.89 through     9.0.120. Users who have followed the security guidance to remove the examples web application are not     affected by this issue. Users are recommended to remove the examples web application or to upgrade to     version 11.0.25, 10.1.58 or 9.0.121 (when released), which fix the issue. (CVE-2026-66299)

  - Insufficient Session Expiration vulnerability in Apache Tomcat meant that if the session ID for an     authenticated HTTP session was changed after a WebSocket connection had been established under that     authenticated HTTP session, the WebSokcet session would not be closed as required by the Jakarta WebSocket     specification when the HTTP session ended. This issue affects Apache Tomcat: from 11.0.0-M1 through     11.0.24, from 10.1.0-M1 through 10.1.57, from 9.0.0.M1 through 9.0.120. The following versions were EOL at     the time the CVE was created but are known to be affected: from 8.5.0 through 8.5.100, from 7.0.43 through     7.0.109. Other unsupported versions may also be affected. Users are recommended to upgrade to version     11.0.25, 10.1.58 or 9.0.121, which fix the issue. (CVE-2026-73180)

  - Uncontrolled Resource Consumption vulnerability in Apache Tomcat via an allocation leak in the HTTP/2     backlog tracking when a stream is reset This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.24,     from 10.1.0-M1 through 10.1.57, from 9.0.39 through 9.0.120. The following versions were EOL at the time     the CVE was created but are known to be affected: from 8.5.59 through 8.5.100. Other unsupported versions     may also be affected. Users are recommended to upgrade to version 11.0.25, 10.1.58 or 9.0.121, which fix     the issue. (CVE-2026-68763)

  - Improper Authentication vulnerability in Apache Tomcat meant that in some circumstances (e.g. CLIENT-CERT,     SPNEGO) that a user would be authenticated even if the user did not exist in the DataSourceRealm. This     issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.24, from 10.1.0-M1 through 10.1.57, from 9.0.0.M1     through 9.0.120. The following versions were EOL at the time the CVE was created but are known to be     affected: from 8.5.0 through 8.5.100, from 7.0.0 through 7.0.109. Other unsupported versions may also be     affected. Users are recommended to upgrade to version 11.0.25, 10.1.58 or 9.0.121, which fix the issue.
    (CVE-2026-68569)

  - Incorrect Authorization vulnerability in Apache Tomcat's FORM authentication process allows the bypassing     of a security constraint that limits user has access to a resource POST but not GET. This issue affects     Apache Tomcat: from 11.0.0-M1 through 11.0.24, from 10.1.0-M1 through 10.1.57, from 9.0.0.M1 through     9.0.120. The following versions were EOL at the time the CVE was created but are known to be affected:
    from 8.5.0 through 8.5.100, from 7.0.0 through 7.0.109. Other unsupported versions may also be affected.
    Users are recommended to upgrade to version 11.0.25, 10.1.58 or 9.0.121, which fixes the issue.
    (CVE-2026-68525)

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	Type	Severity
339985	Linux Distros Unpatched Vulnerability : CVE-2026-73180	Nessus	Misc.	Local	medium
339371	Apache Tomcat 10.1.0.M1 < 10.1.59 multiple vulnerabilities	Nessus	Web Servers	Combined	high
330442	Apache Tomcat 9.0.0.M1 < 9.0.121 multiple vulnerabilities	Nessus	Web Servers	Combined	high
330425	Apache Tomcat 11.0.0.M1 < 11.0.25 multiple vulnerabilities	Nessus	Web Servers	Combined	high

Detections

Analytics

CVE-2026-73180

medium

Tenable Plugins

medium

high

high

high