A buffer overflow in mod_proxy_html in Apache HTTP Server 2.4.67 and earlier allows an attack by an untrusted backend. Users are recommended to upgrade to version 2.4.68, which fixes this issue.

redhat RHSA-2026:41906: RHSA-2026:41906: httpd security, bug fix, and enhancement update (Important)

The remote Redhat Enterprise Linux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2026:41906 advisory.

    The httpd packages provide the Apache HTTP Server, a powerful, efficient, and extensible web server.

    Security Fix(es):

    * httpd: incomplete fix for CVE-2023-38709 (CVE-2024-42516)

    * Apache HTTP Server: mod_rewrite: Apache HTTP Server: Privilege Escalation via .htaccess file     manipulation (CVE-2026-24072)

    * httpd: mod_auth_digest: timing attack allows a bypass of digest authentication (CVE-2026-33006)

    * httpd: NULL pointer dereference via specially crafted request (CVE-2026-29169)

    * httpd: Apache HTTP Server: Heap-based Buffer Overflow via malicious backend servers (CVE-2026-34356)

    * httpd: Apache HTTP Server: Buffer Over-read via outbound OCSP requests to attacker-controlled server     (CVE-2026-44185)

    * httpd: Apache HTTP Server: Denial of Service via crafted regular expressions (CVE-2026-44631)

    * httpd: Apache HTTP Server: Denial of Service in mod_proxy_ftp via attacker-controlled FTP server     (CVE-2026-44186)

    * httpd: Apache httpd mod_dav_fs: Denial of Service due to path handling issue (CVE-2026-42535)

    * httpd: Apache HTTP Server: Heap-based Buffer Overflow via untrusted content in mod_xml2enc     (CVE-2026-42536)

    * httpd: Apache HTTP Server: Buffer overflow in mod_proxy_html allows security bypass (CVE-2026-34355)

    * httpd: Apache HTTP Server: Out-of-bounds Read in mod_headers and mod_mime (CVE-2026-43951)

    * httpd: Apache HTTP Server: Local .htaccess authors can read files with httpd user privileges     (CVE-2026-44119)

    Bug Fix(es) and Enhancement(s):

    * address Moderate severity issues from httpd 2.4.68 [rhel-9.8.z] (JIRA:RHEL-184520)

    * mod_proxy_html regression in CVE-2026-34355 fix [rhel-9.8.z] (JIRA:RHEL-192752)

    For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and     other related information, refer to the CVE page(s) listed in the References section.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux 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 Oracle Linux 10 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2026-34109 advisory.

    - Resolves: RHEL-186221 - httpd: Apache HTTP Server: Heap-based Buffer Overflow       via malicious backend servers (CVE-2026-34356)
    - Resolves: RHEL-186195 - httpd: Apache HTTP Server: Heap-based Buffer Overflow       via untrusted content in mod_xml2enc (CVE-2026-42536)
    - Resolves: RHEL-186182 - httpd: Apache HTTP Server: Buffer overflow in       mod_proxy_html allows security bypass (CVE-2026-34355)
    - Resolves: RHEL-186158 - httpd: Apache HTTP Server: Buffer Over-read via       outbound OCSP requests to attacker-controlled server (CVE-2026-44185)
    - Resolves: RHEL-184305 - httpd: Apache HTTP Server: Denial of Service via       crafted regular expressions (CVE-2026-44631)
    - Resolves : RHEL-182581 - httpd: incomplete fix for       CVE-2023-38709 (CVE-2024-42516)
    - Resolves: RHEL-175621 - httpd: NULL pointer dereference via specially crafted       request (CVE-2026-29169)
    - Also addresses CVE-2026-44119, CVE-2026-44186, CVE-2026-42535,       CVE-2026-24072, CVE-2026-33006, CVE-2026-43951
    - Resolves: RHEL-173549 - httpd: Apache HTTP Server mod_proxy_ajp: Arbitrary       code execution via heap-based buffer overflow (CVE-2026-28780)
    - Resolves: RHEL-175065 - httpd: NULL pointer dereference can cause a child       process crash (CVE-2026-33007)
    - Resolves: RHEL-175095 - httpd: off-by-one out-of-bounds reads in AJP getter       functions (CVE-2026-33857)
    - Resolves: RHEL-175039 - httpd: heap-based buffer over-read due to missing       null-termination check (CVE-2026-34032)

Tenable has extracted the preceding description block directly from the Oracle Linux 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 openSUSE 16 host has packages installed that are affected by multiple vulnerabilities as referenced in the openSUSE-SU-2026:21235-1 advisory.

    This update for apache2 fixes the following issues

    - CVE-2026-29167: mod_ldap per-dir use-after-free (bsc#1267976).
    - CVE-2026-29170: mod_proxy_ftp XSS (bsc#1267977).
    - CVE-2026-34355: mod_proxy_html buffer overflow (bsc#1267978).
    - CVE-2026-34356: malicious backend servers can lead to a heap-based buffer overflow (bsc#1267955).
    - CVE-2026-42535: malicious path manipulation can lead to child process crashes (bsc#1267956).
    - CVE-2026-42536: processing untrusted content can lead to a heap-based buffer overflow (bsc#1267962).
    - CVE-2026-43951: out-of-bound read in `merge_response_headers` can cause crash (bsc#1267963).
    - CVE-2026-44119: improper privilege management can lead to an unauthorized read (bsc#1267965).
    - CVE-2026-44185: Stack Buffer Over-Read in mod_ssl OCSP `send_request` (bsc#1267969).
    - CVE-2026-44186: responses from an attacker-controlled FTP backend can lead to resource exhaustion and a     denial of       service (bsc#1267970).
    - CVE-2026-44631: crafted regular expression can lead to a buffer underwrite (bsc#1267971).
    - CVE-2026-48913: file handle exhaustion during request processing in mod_http2 can lead to a use-after-     free       (bsc#1267972).
    - CVE-2026-49975: Fix cookie header accounting against LimitRequestFields (bsc#1267503).

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 Ubuntu 22.04 LTS / 24.04 LTS / 26.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-8516-1 advisory.

    It was discovered that Apache HTTP Server's mod_ldap module incorrectly handled memory when processing     per-directory configurations. An attacker could use this issue to cause the server to crash, resulting in     a denial of service, or possibly execute arbitrary code. (CVE-2026-29167)

    It was discovered that Apache HTTP Server's mod_proxy_ftp module incorrectly handled HTML generation for     FTP directory listings. A remote attacker could possibly use this issue to inject arbitrary web script or     HTML. (CVE-2026-29170)

    It was discovered that Apache HTTP Server's mod_proxy_html module incorrectly handled certain content from     an untrusted backend. A remote attacker could possibly use this issue to cause Apache HTTP Server to     crash, resulting in a denial of service. (CVE-2026-34355)

    It was discovered that Apache HTTP Server incorrectly handled ProxyPassReverseCookie directives with a     malicious backend server. A remote attacker could possibly use this issue to cause Apache HTTP Server to     crash, resulting in a denial of service. (CVE-2026-34356)

    It was discovered that Apache HTTP Server's mod_dav_fs module incorrectly handled certain path operations.
    An authenticated user could possibly use this issue to manipulate trusted WebDAV property databases or     cause a denial of service. (CVE-2026-42535)

    It was discovered that Apache HTTP Server's mod_xml2enc module incorrectly handled certain content from an     untrusted backend. A remote attacker could possibly use this issue to cause Apache HTTP Server to crash,     resulting in a denial of service. (CVE-2026-42536)

    It was discovered that Apache HTTP Server incorrectly handled response headers when multiple content     languages were configured. A remote attacker could possibly use this issue to obtain sensitive     information. (CVE-2026-43951)

    It was discovered that Apache HTTP Server incorrectly restricted certain file functions in expressions     within .htaccess files. A local attacker with .htaccess write access could possibly use this issue to     obtain sensitive information. (CVE-2026-44119)

    It was discovered that Apache HTTP Server's mod_ssl module incorrectly handled OCSP responses from an     attacker-controlled server. A remote attacker could possibly use this issue to obtain sensitive     information or cause a denial of service. (CVE-2026-44185)

    It was discovered that Apache HTTP Server's mod_proxy_ftp module incorrectly handled responses from an     attacker-controlled backend FTP server. A remote attacker could possibly use this issue to cause Apache     HTTP Server to stop responding, resulting in a denial of service. (CVE-2026-44186)

    It was discovered that Apache HTTP Server incorrectly handled crafted regular expressions in the server     configuration. An attacker could possibly use this issue to execute arbitrary code or cause a denial of     service. (CVE-2026-44631)

    It was discovered that Apache HTTP Server's mod_http2 module had a use-after-free vulnerability when file     handles were exhausted. A remote attacker could possibly use this issue to cause Apache HTTP Server to     crash, resulting in a denial of service. (CVE-2026-48913)

Tenable has extracted the preceding description block directly from the Ubuntu 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 RockyLinux 10 host has packages installed that are affected by multiple vulnerabilities as referenced in the RLSA-2026:34109 advisory.

    * httpd: incomplete fix for CVE-2023-38709 (CVE-2024-42516)

    * httpd: NULL pointer dereference via specially crafted request (CVE-2026-29169)

    * httpd: Apache HTTP Server: Heap-based Buffer Overflow via malicious backend servers (CVE-2026-34356)

    * httpd: Apache HTTP Server: Buffer Over-read via outbound OCSP requests to attacker-controlled server     (CVE-2026-44185)

    * httpd: Apache HTTP Server: Denial of Service via crafted regular expressions (CVE-2026-44631)

    * httpd: Apache HTTP Server: Heap-based Buffer Overflow via untrusted content in mod_xml2enc     (CVE-2026-42536)

    * httpd: Apache HTTP Server: Buffer overflow in mod_proxy_html allows security bypass (CVE-2026-34355)

    Bug Fix(es) and Enhancement(s):

    * address Moderate severity issues from httpd 2.4.68 [rhel-10.2.z] (JIRA:Rocky Linux-184518)

Tenable has extracted the preceding description block directly from the RockyLinux 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 SLED15 / SLED_SAP15 / SLES15 / SLES_SAP15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2026:2759-1 advisory.

    This update for apache2 fixes the following issues

    - CVE-2026-29167: mod_ldap per-dir use-after-free (bsc#1267976).
    - CVE-2026-29170: mod_proxy_ftp XSS (bsc#1267977).
    - CVE-2026-34355: mod_proxy_html buffer overflow (bsc#1267978).
    - CVE-2026-34356: malicious backend servers can lead to a heap-based buffer overflow (bsc#1267955).
    - CVE-2026-42535: malicious path manipulation can lead to child process crashes (bsc#1267956).
    - CVE-2026-42536: processing untrusted content can lead to a heap-based buffer overflow (bsc#1267962).
    - CVE-2026-43951: out-of-bound read in `merge_response_headers` can cause crash (bsc#1267963).
    - CVE-2026-44119: improper privilege management can lead to an unauthorized read (bsc#1267965).
    - CVE-2026-44185: Stack Buffer Over-Read in mod_ssl OCSP `send_request` (bsc#1267969).
    - CVE-2026-44186: responses from an attacker-controlled FTP backend can lead to resource exhaustion and a     denial of       service (bsc#1267970).
    - CVE-2026-44631: crafted regular expression can lead to a buffer underwrite (bsc#1267971).
    - CVE-2026-48913: file handle exhaustion during request processing in mod_http2 can lead to a use-after-     free       (bsc#1267972).
    - CVE-2026-49975: Fix cookie header accounting against LimitRequestFields (bsc#1267503).

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 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2026:2735-1 advisory.

    This update for apache2 fixes the following issues

    - CVE-2026-29167: mod_ldap per-dir use-after-free (bsc#1267976).
    - CVE-2026-29170: mod_proxy_ftp XSS (bsc#1267977).
    - CVE-2026-34355: mod_proxy_html buffer overflow (bsc#1267978).
    - CVE-2026-34356: malicious backend servers can lead to a heap-based buffer overflow (bsc#1267955).
    - CVE-2026-42535: malicious path manipulation can lead to child process crashes (bsc#1267956).
    - CVE-2026-42536: processing untrusted content can lead to a heap-based buffer overflow (bsc#1267962).
    - CVE-2026-43951: out-of-bound read in `merge_response_headers` can cause crash (bsc#1267963).
    - CVE-2026-44119: improper privilege management can lead to an unauthorized read (bsc#1267965).
    - CVE-2026-44185: Stack Buffer Over-Read in mod_ssl OCSP `send_request` (bsc#1267969).
    - CVE-2026-44186: responses from an attacker-controlled FTP backend can lead to resource exhaustion and a     denial of       service (bsc#1267970).
    - CVE-2026-44631: crafted regular expression can lead to a buffer underwrite (bsc#1267971).
    - CVE-2026-48913: file handle exhaustion during request processing in mod_http2 can lead to a use-after-     free       (bsc#1267972).
    - CVE-2026-49975: Fix cookie header accounting against LimitRequestFields (bsc#1267503).

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 SLES12 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2026:2717-1 advisory.

    This update for apache2 fixes the following issues

    - CVE-2026-29167: mod_ldap per-dir use-after-free (bsc#1267976).
    - CVE-2026-29170: mod_proxy_ftp XSS (bsc#1267977).
    - CVE-2026-34355: mod_proxy_html buffer overflow (bsc#1267978).
    - CVE-2026-34356: malicious backend servers can lead to a heap-based buffer overflow (bsc#1267955).
    - CVE-2026-42535: malicious path manipulation can lead to child process crashes (bsc#1267956).
    - CVE-2026-42536: processing untrusted content can lead to a heap-based buffer overflow (bsc#1267962).
    - CVE-2026-43951: out-of-bound read in `merge_response_headers` can cause crash (bsc#1267963).
    - CVE-2026-44119: improper privilege management can lead to an unauthorized read (bsc#1267965).
    - CVE-2026-44185: Stack Buffer Over-Read in mod_ssl OCSP `send_request` (bsc#1267969).
    - CVE-2026-44186: responses from an attacker-controlled FTP backend can lead to resource exhaustion and a     denial of       service (bsc#1267970).
    - CVE-2026-44631: crafted regular expression can lead to a buffer underwrite (bsc#1267971).
    - CVE-2026-48913: file handle exhaustion during request processing in mod_http2 can lead to a use-after-     free       (bsc#1267972).
    - CVE-2026-49975: Fix cookie header accounting against LimitRequestFields (bsc#1267503).

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 AlmaLinux 10 host has packages installed that are affected by multiple vulnerabilities as referenced in the ALSA-2026:34109 advisory.

    * httpd: incomplete fix for CVE-2023-38709 (CVE-2024-42516)
      * httpd: NULL pointer dereference via specially crafted request (CVE-2026-29169)
      * httpd: Apache HTTP Server: Heap-based Buffer Overflow via malicious backend servers (CVE-2026-34356)
      * httpd: Apache HTTP Server: Buffer Over-read via outbound OCSP requests to attacker-controlled server     (CVE-2026-44185)
      * httpd: Apache HTTP Server: Denial of Service via crafted regular expressions (CVE-2026-44631)
      * httpd: Apache HTTP Server: Heap-based Buffer Overflow via untrusted content in mod_xml2enc     (CVE-2026-42536)
      * httpd: Apache HTTP Server: Buffer overflow in mod_proxy_html allows security bypass (CVE-2026-34355)


    Bug Fix(es) and Enhancement(s):

      * address Moderate severity issues from httpd 2.4.68 [almalinux-10.2.z] (JIRA:AlmaLinux-184518)

Tenable has extracted the preceding description block directly from the AlmaLinux 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 Redhat Enterprise Linux 10 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2026:34109 advisory.

    The httpd packages provide the Apache HTTP Server, a powerful, efficient, and extensible web server.

    Security Fix(es):

    * httpd: incomplete fix for CVE-2023-38709 (CVE-2024-42516)

    * httpd: NULL pointer dereference via specially crafted request (CVE-2026-29169)

    * httpd: Apache HTTP Server: Heap-based Buffer Overflow via malicious backend servers (CVE-2026-34356)

    * httpd: Apache HTTP Server: Buffer Over-read via outbound OCSP requests to attacker-controlled server     (CVE-2026-44185)

    * httpd: Apache HTTP Server: Denial of Service via crafted regular expressions (CVE-2026-44631)

    * httpd: Apache HTTP Server: Heap-based Buffer Overflow via untrusted content in mod_xml2enc     (CVE-2026-42536)

    * httpd: Apache HTTP Server: Buffer overflow in mod_proxy_html allows security bypass (CVE-2026-34355)

    Bug Fix(es) and Enhancement(s):

    * address Moderate severity issues from httpd 2.4.68 [rhel-10.2.z] (JIRA:RHEL-184518)

    For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and     other related information, refer to the CVE page(s) listed in the References section.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux 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 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2026:2686-1 advisory.

    This update for apache2 fixes the following issues

    - CVE-2026-23918: http2: double free and possible RCE on early reset (bsc#1263957).
    - CVE-2026-24072: mod_rewrite elevation of privileges via ap_expr (bsc#1263935).
    - CVE-2026-28780: heap buffer overflow in `mod_proxy_ajp` via `ajp_msg_check_header()` (bsc#1264163).
    - CVE-2026-29167: mod_ldap per-dir use-after-free (bsc#1267976).
    - CVE-2026-29168: allocation of resources without limits in `mod_md` via OCSP response (bsc#1264150).
    - CVE-2026-29169: NULL pointer dereference in `mod_dav_lock` allows server crash via malicious requests     (bsc#1263956).
    - CVE-2026-29170: mod_proxy_ftp XSS (bsc#1267977).
    - CVE-2026-33006: `mod_auth_digest` timing attack allows bypass of Digest authentication (bsc#1263955).
    - CVE-2026-33007: NULL pointer dereference in `mod_authn_socache` allows unauthenticated remote user to     crash a child       processes (bsc#1263954).
    - CVE-2026-33523: HTTP response splitting forwarding malicious status line (bsc#1263953).
    - CVE-2026-33857: off-by-one OOB reads in AJP getter functions (bsc#1263952).
    - CVE-2026-34032: heap buffer overread in `mod_proxy_ajp` due to missing null-termination check     (bsc#1263951).
    - CVE-2026-34059: heap buffer overread and memory disclosure via `ajp_parse_data()` (bsc#1263950).
    - CVE-2026-34355: mod_proxy_html buffer overflow (bsc#1267978).
    - CVE-2026-34356: malicious backend servers can lead to a heap-based buffer overflow (bsc#1267955).
    - CVE-2026-42535: malicious path manipulation can lead to child process crashes (bsc#1267956).
    - CVE-2026-42536: processing untrusted content can lead to a heap-based buffer overflow (bsc#1267962).
    - CVE-2026-43951: out-of-bound read in `merge_response_headers` can cause crash (bsc#1267963).
    - CVE-2026-44119: improper privilege management can lead to an unauthorized read (bsc#1267965).
    - CVE-2026-44185: Stack Buffer Over-Read in mod_ssl OCSP `send_request` (bsc#1267969).
    - CVE-2026-44186: responses from an attacker-controlled FTP backend can lead to resource exhaustion and a     denial of       service (bsc#1267970).
    - CVE-2026-44631: crafted regular expression can lead to a buffer underwrite (bsc#1267971).
    - CVE-2026-48913: file handle exhaustion during request processing in mod_http2 can lead to a use-after-     free       (bsc#1267972).
    - CVE-2026-49975: Fix cookie header accounting against LimitRequestFields (bsc#1267503).

    Non security issue:

    - Update to 2.4.66 (jsc#PED-16334).

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.

It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2023-2026-1880 advisory.

    Use After Free vulnerability in Apache HTTP Server with mod_ldap in per-directory configuration

    This issue affects Apache HTTP Server: from 2.4.0 through 2.4.67.

    Users are recommended to upgrade to version 2.4.68, which fixes the issue. (CVE-2026-29167)

    A cross-site scripting vulnerability exists in mod_proxy_ftp's HTML directory list generation in Apache     HTTP Server 2.4.67 and earlier when listing FTP directory contents either via forward or reverse proxy     configuration.

    Users are recommended to upgrade to version 2.4.68, which fixes this issue. (CVE-2026-29170)

    A buffer overflow in mod_proxy_html in Apache HTTP Server 2.4.67 and earlier allows an attack by an     untrusted backend.Users are recommended to upgrade to version 2.4.68, which fixes this issue.
    (CVE-2026-34355)

    Heap-based Buffer Overflow vulnerability in Apache HTTP Server with malicious backend servers and     ProxyPassReverseCookie*

    This issue affects Apache HTTP Server: from 2.4.0 through 2.4.67.

    Users are recommended to upgrade to version 2.4.68, which fixes the issue. (CVE-2026-34356)

    A path handling issue in mod_dav_fs in Apache 2.4.67 and earlier allows a WebDAV content author to     directly manipulate trusted DAV property databases, potentially causing child process crashes.

    Users are recommended to upgrade to version 2.4.68, which fixes this issue. (CVE-2026-42535)

    Heap-based Buffer Overflow vulnerability in Apache HTTP Server with mod_xml2enc, xml2StartParse, and     untrusted content

    This issue affects Apache HTTP Server: from 2.4.0 through 2.4.67.

    Users are recommended to upgrade to version 2.4.68, which fixes the issue. (CVE-2026-42536)

    Out-of-bounds Read vulnerability in Apache HTTP Server with mod_headers and mod_mime and multiple response     languages.

    This issue affects Apache HTTP Server: from 2.4.0 through 2.4.67. (CVE-2026-43951)

    Improper Privilege Management vulnerability in Apache HTTP Server 2.4.67 and earlier allows local     .htaccess authors to read files with the privileges of the httpd user.

    This issue affects Apache HTTP Server: from through 2.4.67.

    Users are recommended to upgrade to version 2.4.68, which fixes the issue. (CVE-2026-44119)

    Buffer Over-read vulnerability in Apache HTTP Server via outbound OCSP requests to an attacker controlled     OCSP server

    This issue affects Apache HTTP Server: from 2.4.0 through 2.4.67.

    Users are recommended to upgrade to version 2.4.68, which fixes the issue. (CVE-2026-44185)

    Loop with Unreachable Exit Condition ('Infinite Loop') vulnerability in the mod_proxy_ftp module in Apache     HTTP Server with an attacker controlled backend FTP server.

    This issue affects undefined: from 2.4.0 through 2.4.67.

    Users are recommended to upgrade to version 2.4.68, which fixes the issue. (CVE-2026-44186)

    Buffer Underwrite vulnerability in Apache HTTP Server on crafted regular expressions in the configuration.

    This issue affects Apache HTTP Server: from 2.4.0 through 2.4.67.

    Users are recommended to upgrade to version 2.4.68, which fixes the issue. (CVE-2026-44631)

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 version of httpd installed on the remote host is prior to 2.4.68-1. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2-2026-3379 advisory.

    Use After Free vulnerability in Apache HTTP Server with mod_ldap in per-directory configuration

    This issue affects Apache HTTP Server: from 2.4.0 through 2.4.67.

    Users are recommended to upgrade to version 2.4.68, which fixes the issue. (CVE-2026-29167)

    A cross-site scripting vulnerability exists in mod_proxy_ftp's HTML directory list generation in Apache     HTTP Server 2.4.67 and earlier when listing FTP directory contents either via forward or reverse proxy     configuration.

    Users are recommended to upgrade to version 2.4.68, which fixes this issue. (CVE-2026-29170)

    A buffer overflow in mod_proxy_html in Apache HTTP Server 2.4.67 and earlier allows an attack by an     untrusted backend.Users are recommended to upgrade to version 2.4.68, which fixes this issue.
    (CVE-2026-34355)

    Heap-based Buffer Overflow vulnerability in Apache HTTP Server with malicious backend servers and     ProxyPassReverseCookie*

    This issue affects Apache HTTP Server: from 2.4.0 through 2.4.67.

    Users are recommended to upgrade to version 2.4.68, which fixes the issue. (CVE-2026-34356)

    A path handling issue in mod_dav_fs in Apache 2.4.67 and earlier allows a WebDAV content author to     directly manipulate trusted DAV property databases, potentially causing child process crashes.

    Users are recommended to upgrade to version 2.4.68, which fixes this issue. (CVE-2026-42535)

    Heap-based Buffer Overflow vulnerability in Apache HTTP Server with mod_xml2enc, xml2StartParse, and     untrusted content

    This issue affects Apache HTTP Server: from 2.4.0 through 2.4.67.

    Users are recommended to upgrade to version 2.4.68, which fixes the issue. (CVE-2026-42536)

    Out-of-bounds Read vulnerability in Apache HTTP Server with mod_headers and mod_mime and multiple response     languages.

    This issue affects Apache HTTP Server: from 2.4.0 through 2.4.67. (CVE-2026-43951)

    Improper Privilege Management vulnerability in Apache HTTP Server 2.4.67 and earlier allows local     .htaccess authors to read files with the privileges of the httpd user.

    This issue affects Apache HTTP Server: from through 2.4.67.

    Users are recommended to upgrade to version 2.4.68, which fixes the issue. (CVE-2026-44119)

    Buffer Over-read vulnerability in Apache HTTP Server via outbound OCSP requests to an attacker controlled     OCSP server

    This issue affects Apache HTTP Server: from 2.4.0 through 2.4.67.

    Users are recommended to upgrade to version 2.4.68, which fixes the issue. (CVE-2026-44185)

    Loop with Unreachable Exit Condition ('Infinite Loop') vulnerability in the mod_proxy_ftp module in Apache     HTTP Server with an attacker controlled backend FTP server.

    This issue affects undefined: from 2.4.0 through 2.4.67.

    Users are recommended to upgrade to version 2.4.68, which fixes the issue. (CVE-2026-44186)

    Buffer Underwrite vulnerability in Apache HTTP Server on crafted regular expressions in the configuration.

    This issue affects Apache HTTP Server: from 2.4.0 through 2.4.67.

    Users are recommended to upgrade to version 2.4.68, which fixes the issue. (CVE-2026-44631)

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.

According to its banner, the version of Apache running on the remote host is 2.4.x prior to 2.4.68. It is, therefore, affected by multiple vulnerabilities:

- Use After Free vulnerability in Apache HTTP Server with mod_ldap in per-directory configuration. (CVE-2026-29167)

- A cross-site scripting vulnerability exists in mod_proxy_ftp's HTML directory list generation when listing FTP directory contents either via forward or reverse proxy configuration. (CVE-2026-29170)

- A buffer overflow in mod_proxy_html in Apache HTTP Server allows an attack by an untrusted backend. (CVE-2026-34355)

- Heap-based Buffer Overflow vulnerability in Apache HTTP Server with malicious backend servers and ProxyPassReverseCookie. (CVE-2026-34356)

- A path handling issue in mod_dav_fs allows a WebDAV content author to directly manipulate trusted DAV property databases, potentially causing child process crashes. (CVE-2026-42535)

- Heap-based Buffer Overflow vulnerability in Apache HTTP Server with mod_xml2enc, xml2StartParse, and untrusted content. (CVE-2026-42536)

- Out-of-bounds Read vulnerability in Apache HTTP Server with mod_headers and mod_mime and multiple response languages. (CVE-2026-43951)

- Improper Privilege Management vulnerability in Apache HTTP Server allows local .htaccess authors to read files with the privileges of the httpd user. (CVE-2026-44119)

- Buffer Over-read vulnerability in Apache HTTP Server via outbound OCSP requests to an attacker controlled OCSP server. (CVE-2026-44185)

- Loop with Unreachable Exit Condition vulnerability in the mod_proxy_ftp module in Apache HTTP Server with an attacker controlled backend FTP server. (CVE-2026-44186)

- Buffer Underwrite vulnerability in Apache HTTP Server on crafted regular expressions in the configuration. (CVE-2026-44631)

- Use After Free vulnerability in Apache HTTP Server module mod_http2 when file handles are already exhausted. (CVE-2026-48913)

- Memory Allocation with Excessive Size Value vulnerability in Apache HTTP Server's mod_http2 leads to denial of service via malicious HTTP requests. (CVE-2026-49975)

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

The remote Debian 11 host has packages installed that are affected by multiple vulnerabilities as referenced in the dla-4629 advisory.

    - -------------------------------------------------------------------------     Debian LTS Advisory DLA-4629-1                debian-lts@lists.debian.org     https://www.debian.org/lts/security/                   Bastien Roucaris     June 12, 2026                                 https://wiki.debian.org/LTS
    - -------------------------------------------------------------------------

    Package        : apache2     Version        : 2.4.67-1~deb11u3     CVE ID         : CVE-2026-29167 CVE-2026-29170 CVE-2026-34355 CVE-2026-34356                      CVE-2026-42535 CVE-2026-42536 CVE-2026-43951 CVE-2026-44119                      CVE-2026-44185 CVE-2026-44186 CVE-2026-44631 CVE-2026-48913     Debian Bug     : 1139340

    Multiple vulnerabilities have been discovered in the Apache HTTP server,     which may result in remote code execution, privilege escalation, denial     of service or information disclosure.

    For Debian 11 bullseye, these problems have been fixed in version     2.4.67-1~deb11u3.

    We recommend that you upgrade your apache2 packages.

    For the detailed security status of apache2 please refer to     its security tracker page at:
    https://security-tracker.debian.org/tracker/apache2

    Further information about Debian LTS security advisories, how to apply     these updates to your system and frequently asked questions can be     found at: https://wiki.debian.org/LTS

Tenable has extracted the preceding description block directly from the Debian 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 FreeBSD installed on the remote host is prior to tested version. It is, therefore, affected by multiple vulnerabilities as referenced in the 7655baae-637d-11f1-8607-8447094a420f advisory.

    The Apache httpd project reports:
    See links for details.

Tenable has extracted the preceding description block directly from the FreeBSD 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 Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - A buffer overflow in mod_proxy_html in Apache HTTP Server 2.4.67 and earlier allows an attack by an     untrusted backend. Users are recommended to upgrade to version 2.4.68, which fixes this issue.
    (CVE-2026-34355)

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

The version of Apache httpd installed on the remote host is prior to 2.4.68. It is, therefore, affected by multiple vulnerabilities as referenced in the 2.4.68 advisory.

  - CVE-2026-49975, also known as HTTP/2 Bomb, is a remote denial-of-service exploit against most major web     servers, including: nginx, Apache httpd, Microsoft IIS, Envoy, Cloudflare Pingor. The vulnerable behavior     exists in each server's default HTTP/2 configuration (CVE-2026-49975)

  - mod_xml2enc heap overflow: Heap-based Buffer Overflow vulnerability in Apache HTTP Server with     mod_xml2enc, xml2StartParse, and untrusted content This issue affects Apache HTTP Server: from 2.4.0     through 2.4.67. Users are recommended to upgrade to version 2.4.68, which fixes the issue.
    Acknowledgements: finder: Zhenpeng (Leo) Lin at depthfirst (CVE-2026-42536)

  - OOB Read in `merge_response_headers` can cause crash: Out-of-bounds Read vulnerability in Apache HTTP     Server with mod_headers and mod_mime and multiple response languages. This issue affects Apache HTTP     Server: from 2.4.0 through 2.4.67. Acknowledgements: finder: Zhenpeng (Leo) Lin at depthfirst     (CVE-2026-43951)

  - escalation of privilege through expressions in .htaccess in multiple modules: Improper Privilege     Management vulnerability in Apache HTTP Server 2.4.67 and earlier allows local .htaccess authors to read     files with the privileges of the httpd user. This issue affects Apache HTTP Server: from through 2.4.67.
    Users are recommended to upgrade to version 2.4.68, which fixes the issue. Acknowledgements:
    (CVE-2026-44119)

  - Stack Buffer Over-Read in mod_ssl OCSP `send_request`: Buffer Over-read vulnerability in Apache HTTP     Server via outbound OCSP requests to an attacker controlled OCSP server This issue affects Apache HTTP     Server: from 2.4.0 through 2.4.67. Users are recommended to upgrade to version 2.4.68, which fixes the     issue. Acknowledgements: finder: Zhenpeng (Leo) Lin at depthfirst (CVE-2026-44185)

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
327970	RHEL 9 : httpd (RHSA-2026:41906)	Nessus	Red Hat Local Security Checks	critical
327629	Oracle Linux 10 : httpd (ELSA-2026-34109)	Nessus	Oracle Linux Local Security Checks	critical
326020	openSUSE 16: apache2 / apache2-devel / apache2-event / apache2-manual / etc (openSUSE-SU-2026:21235-1)	Nessus	SuSE Local Security Checks	high
325960	Ubuntu 22.04 LTS / 24.04 LTS / 26.04 LTS : Apache HTTP Server vulnerabilities (USN-8516-1)	Nessus	Ubuntu Local Security Checks	critical
325386	RockyLinux 10 : httpd (RLSA-2026:34109)	Nessus	Rocky Linux Local Security Checks	critical
325365	SUSE SLED15: apache2 / apache2-devel / apache2-event / apache2-manual / etc (SUSE-SU-2026:2759-1)	Nessus	SuSE Local Security Checks	high
325031	SUSE SLES15: apache2 / apache2-devel / apache2-manual / apache2-prefork / etc (SUSE-SU-2026:2735-1)	Nessus	SuSE Local Security Checks	high
324837	SUSE SLES12: apache2 / apache2-devel / apache2-doc / apache2-example-pages / etc (SUSE-SU-2026:2717-1)	Nessus	SuSE Local Security Checks	high
324590	AlmaLinux 10 : httpd (ALSA-2026:34109)	Nessus	Alma Linux Local Security Checks	critical
324571	RHEL 10 : httpd (RHSA-2026:34109)	Nessus	Red Hat Local Security Checks	critical
324047	SUSE SLES15: apache2 / apache2-devel / apache2-doc / apache2-prefork / etc (SUSE-SU-2026:2686-1)	Nessus	SuSE Local Security Checks	high
322110	Amazon Linux 2023 : httpd, httpd-core, httpd-devel (ALAS2023-2026-1880)	Nessus	Amazon Linux Local Security Checks	critical
322004	Amazon Linux 2 : httpd, --advisory ALAS2-2026-3379 (ALAS-2026-3379)	Nessus	Amazon Linux Local Security Checks	critical
115263	Apache 2.4.x < 2.4.68 Multiple Vulnerabilities	Web App Scanning	Component Vulnerability	high
320880	Debian dla-4629 : apache2 - security update	Nessus	Debian Local Security Checks	critical
320010	FreeBSD : Apache httpd -- Multiple vulnerabilities (7655baae-637d-11f1-8607-8447094a420f)	Nessus	FreeBSD Local Security Checks	critical
319917	Linux Distros Unpatched Vulnerability : CVE-2026-34355	Nessus	Misc.	high
319665	Apache 2.4.x < 2.4.68 Multiple Vulnerabilities	Nessus	Web Servers	high

Detections

Analytics

CVE-2026-34355

high

Tenable Plugins

Coming Soon

critical

critical

high

critical

critical

high

high

high

critical

critical

high

critical

critical

high

critical

critical

high

high