CVE-2025-65082

Improper Neutralization of Escape, Meta, or Control Sequences vulnerability in Apache HTTP Server through environment variables set via the Apache configuration unexpectedly superseding variables calculated by the server for CGI programs.

This issue affects Apache HTTP Server from 2.4.0 through 2.4.65.

Users are recommended to upgrade to version 2.4.66 which fixes the issue.

Improper Neutralization of Escape, Meta, or Control Sequences vulnerability in Apache HTTP Server through environment variables set via the Apache configuration unexpectedly superseding variables calculated by the server for CGI programs. This issue affects Apache HTTP Server from 2.4.0 through 2.4.65. Users are recommended to upgrade to version 2.4.66 which fixes the issue.

Apache HTTP Server is a powerful and flexible HTTP/1.1 compliant web server.

Security Fix(es):

An integer overflow vulnerability was found in Apache HTTP Server versions 2.4.30 to 2.4.66. In case of failed ACME certificate renewal, after a number of failures (~30 days in default configurations), the backoff timer becomes 0. Certificate renewal attempts are then repeated without delays until successful. This issue affects confidentiality, integrity, and availability.(CVE-2025-55753)

Apache HTTP Server 2.4.65 and earlier with Server Side Includes (SSI) enabled and mod_cgid (but not mod_cgi) passes the shell-escaped query string to #exec cmd="..." directives.

This issue affects Apache HTTP Server before 2.4.66.

Users are recommended to upgrade to version 2.4.66, which fixes the issue.(CVE-2025-58098)

Improper Neutralization of Escape, Meta, or Control Sequences vulnerability in Apache HTTP Server through environment variables set via the Apache configuration unexpectedly superseding variables calculated by the server for CGI programs.

This issue affects Apache HTTP Server from 2.4.0 through 2.4.65.

Users are recommended to upgrade to version 2.4.66 which fixes the issue.(CVE-2025-65082)

mod_userdir+suexec bypass via AllowOverride FileInfo vulnerability in Apache HTTP Server. Users with access to use the RequestHeader directive in htaccess can cause some CGI scripts to run under an unexpected userid.

This issue affects Apache HTTP Server: from 2.4.7 through 2.4.65.

Users are recommended to upgrade to version 2.4.66, which fixes the issue.(CVE-2025-66200)

Apache HTTP Server is a powerful and flexible HTTP/1.1 compliant web server.

Security Fix(es):

An integer overflow vulnerability was found in Apache HTTP Server versions 2.4.30 to 2.4.66. In case of failed ACME certificate renewal, after a number of failures (~30 days in default configurations), the backoff timer becomes 0. Certificate renewal attempts are then repeated without delays until successful. This issue affects confidentiality, integrity, and availability.(CVE-2025-55753)

Apache HTTP Server 2.4.65 and earlier with Server Side Includes (SSI) enabled and mod_cgid (but not mod_cgi) passes the shell-escaped query string to #exec cmd="..." directives.

This issue affects Apache HTTP Server before 2.4.66.

Users are recommended to upgrade to version 2.4.66, which fixes the issue.(CVE-2025-58098)

Improper Neutralization of Escape, Meta, or Control Sequences vulnerability in Apache HTTP Server through environment variables set via the Apache configuration unexpectedly superseding variables calculated by the server for CGI programs.

This issue affects Apache HTTP Server from 2.4.0 through 2.4.65.

Users are recommended to upgrade to version 2.4.66 which fixes the issue.(CVE-2025-65082)

mod_userdir+suexec bypass via AllowOverride FileInfo vulnerability in Apache HTTP Server. Users with access to use the RequestHeader directive in htaccess can cause some CGI scripts to run under an unexpected userid.

This issue affects Apache HTTP Server: from 2.4.7 through 2.4.65.

Users are recommended to upgrade to version 2.4.66, which fixes the issue.(CVE-2025-66200)

Apache HTTP Server is a powerful and flexible HTTP/1.1 compliant web server.

Security Fix(es):

An integer overflow vulnerability was found in Apache HTTP Server versions 2.4.30 to 2.4.66. In case of failed ACME certificate renewal, after a number of failures (~30 days in default configurations), the backoff timer becomes 0. Certificate renewal attempts are then repeated without delays until successful. This issue affects confidentiality, integrity, and availability.(CVE-2025-55753)

Apache HTTP Server 2.4.65 and earlier with Server Side Includes (SSI) enabled and mod_cgid (but not mod_cgi) passes the shell-escaped query string to #exec cmd="..." directives.

This issue affects Apache HTTP Server before 2.4.66.

Users are recommended to upgrade to version 2.4.66, which fixes the issue.(CVE-2025-58098)

Improper Neutralization of Escape, Meta, or Control Sequences vulnerability in Apache HTTP Server through environment variables set via the Apache configuration unexpectedly superseding variables calculated by the server for CGI programs.

This issue affects Apache HTTP Server from 2.4.0 through 2.4.65.

Users are recommended to upgrade to version 2.4.66 which fixes the issue.(CVE-2025-65082)

mod_userdir+suexec bypass via AllowOverride FileInfo vulnerability in Apache HTTP Server. Users with access to use the RequestHeader directive in htaccess can cause some CGI scripts to run under an unexpected userid.

This issue affects Apache HTTP Server: from 2.4.7 through 2.4.65.

Users are recommended to upgrade to version 2.4.66, which fixes the issue.(CVE-2025-66200)

Apache HTTP Server is a powerful and flexible HTTP/1.1 compliant web server.

Security Fix(es):

Apache HTTP Server 2.4.65 and earlier with Server Side Includes (SSI) enabled and mod_cgid (but not mod_cgi) passes the shell-escaped query string to #exec cmd="..." directives.

This issue affects Apache HTTP Server before 2.4.66.

Users are recommended to upgrade to version 2.4.66, which fixes the issue.(CVE-2025-58098)

Improper Neutralization of Escape, Meta, or Control Sequences vulnerability in Apache HTTP Server through environment variables set via the Apache configuration unexpectedly superseding variables calculated by the server for CGI programs.

This issue affects Apache HTTP Server from 2.4.0 through 2.4.65.

Users are recommended to upgrade to version 2.4.66 which fixes the issue.(CVE-2025-65082)

mod_userdir+suexec bypass via AllowOverride FileInfo vulnerability in Apache HTTP Server. Users with access to use the RequestHeader directive in htaccess can cause some CGI scripts to run under an unexpected userid.

This issue affects Apache HTTP Server: from 2.4.7 through 2.4.65.

Users are recommended to upgrade to version 2.4.66, which fixes the issue.(CVE-2025-66200)

Apache HTTP Server is a powerful and flexible HTTP/1.1 compliant web server.

Security Fix(es):

An integer overflow vulnerability was found in Apache HTTP Server versions 2.4.30 to 2.4.66. In case of failed ACME certificate renewal, after a number of failures (~30 days in default configurations), the backoff timer becomes 0. Certificate renewal attempts are then repeated without delays until successful. This issue affects confidentiality, integrity, and availability.(CVE-2025-55753)

Apache HTTP Server 2.4.65 and earlier with Server Side Includes (SSI) enabled and mod_cgid (but not mod_cgi) passes the shell-escaped query string to #exec cmd="..." directives.

This issue affects Apache HTTP Server before 2.4.66.

Users are recommended to upgrade to version 2.4.66, which fixes the issue.(CVE-2025-58098)

Improper Neutralization of Escape, Meta, or Control Sequences vulnerability in Apache HTTP Server through environment variables set via the Apache configuration unexpectedly superseding variables calculated by the server for CGI programs.

This issue affects Apache HTTP Server from 2.4.0 through 2.4.65.

Users are recommended to upgrade to version 2.4.66 which fixes the issue.(CVE-2025-65082)

mod_userdir+suexec bypass via AllowOverride FileInfo vulnerability in Apache HTTP Server. Users with access to use the RequestHeader directive in htaccess can cause some CGI scripts to run under an unexpected userid.

This issue affects Apache HTTP Server: from 2.4.7 through 2.4.65.

Users are recommended to upgrade to version 2.4.66, which fixes the issue.(CVE-2025-66200)

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

Security Fix(es):

• httpd: Apache HTTP Server: CGI environment variable override (CVE-2025-65082)

• mod_md: Apache HTTP Server: mod_md (ACME), unintended retry intervals (CVE-2025-55753)

• httpd: Apache HTTP Server: mod_userdir+suexec bypass via AllowOverride FileInfo (CVE-2025-66200)

• httpd: Apache HTTP Server: Server Side Includes adds query string to #exec cmd=... (CVE-2025-58098)

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.

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

Security Fix(es):

• httpd: Apache HTTP Server: CGI environment variable override (CVE-2025-65082)

• httpd: Apache HTTP Server: mod_userdir+suexec bypass via AllowOverride FileInfo (CVE-2025-66200)

• httpd: Apache HTTP Server: Server Side Includes adds query string to #exec cmd=... (CVE-2025-58098)

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.

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

Security Fix(es):

• httpd: Apache HTTP Server: CGI environment variable override (CVE-2025-65082)

• httpd: Apache HTTP Server: mod_userdir+suexec bypass via AllowOverride FileInfo (CVE-2025-66200)

• httpd: Apache HTTP Server: Server Side Includes adds query string to #exec cmd=... (CVE-2025-58098)

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.

Improper Neutralization of Escape, Meta, or Control Sequences vulnerability in Apache HTTP Server through environment variables set via the Apache configuration unexpectedly superseding variables calculated by the server for CGI programs. This issue affects Apache HTTP Server from 2.4.0 through 2.4.65. Users are recommended to upgrade to version 2.4.66 which fixes the issue.

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

Security Fix(es):

• httpd: Apache HTTP Server: CGI environment variable override (CVE-2025-65082)
• mod_md: Apache HTTP Server: mod_md (ACME), unintended retry intervals (CVE-2025-55753)
• httpd: Apache HTTP Server: mod_userdir+suexec bypass via AllowOverride FileInfo (CVE-2025-66200)
• httpd: Apache HTTP Server: Server Side Includes adds query string to #exec cmd=... (CVE-2025-58098)

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.

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

Security Fix(es):

• httpd: Apache HTTP Server: CGI environment variable override (CVE-2025-65082)
• httpd: Apache HTTP Server: mod_userdir+suexec bypass via AllowOverride FileInfo (CVE-2025-66200)
• httpd: Apache HTTP Server: Server Side Includes adds query string to #exec cmd=... (CVE-2025-58098)

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.

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

Security Fix(es):

• httpd: Apache HTTP Server: CGI environment variable override (CVE-2025-65082)
• httpd: Apache HTTP Server: mod_userdir+suexec bypass via AllowOverride FileInfo (CVE-2025-66200)
• httpd: Apache HTTP Server: Server Side Includes adds query string to #exec cmd=... (CVE-2025-58098)

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.

Improper Neutralization of Escape, Meta, or Control Sequences vulnerability in Apache HTTP Server through environment variables set via the Apache configuration unexpectedly superseding variables calculated by the server for CGI programs.

This issue affects Apache HTTP Server from 2.4.0 through 2.4.65.

Users are recommended to upgrade to version 2.4.66 which fixes the issue.

Improper Neutralization of Escape, Meta, or Control Sequences vulnerability in Apache HTTP Server through environment variables set via the Apache configuration unexpectedly superseding variables calculated by the server for CGI programs.

This issue affects Apache HTTP Server from 2.4.0 through 2.4.65.

Users are recommended to upgrade to version 2.4.66 which fixes the issue.

Improper Neutralization of Escape, Meta, or Control Sequences vulnerability in Apache HTTP Server through environment variables set via the Apache configuration unexpectedly superseding variables calculated by the server for CGI programs.

This issue affects Apache HTTP Server from 2.4.0 through 2.4.65.

Users are recommended to upgrade to version 2.4.66 which fixes the issue.

• CVE-2025-65082: fix CGI environment variable injection by preventing HTTP headers from overriding server-set variables
• CVE-2025-66200: prevent suexec bypass by removing request notes usage and rejecting the undocumented RequestHeader note option

• CVE-2025-66200: don't use request notes for suexec, stop accepting the obscure "note" option in RequestHeader
• CVE-2025-65082: fix precedence of envvars from HTTP headers and Apache configuration

• CVE-2025-66200: don't use request notes for suexec, stop accepting the obscure "note" option in RequestHeader
• CVE-2025-65082: fix precedence of envvars from HTTP headers and Apache configuration

• CVE-2025-66200: don't use request notes for suexec, stop accepting the obscure "note" option in RequestHeader
• CVE-2025-65082: fix precedence of envvars from HTTP headers and Apache configuration

• CVE-2025-65082: fix CGI environment variable injection by preventing HTTP headers from overriding server-set variables and added regression tests
• CVE-2025-66200: prevent suexec bypass by removing request notes usage and rejecting the undocumented RequestHeader note option

Apache HTTP Server: mod_md (ACME), unintended retry intervals. (CVE-2025-55753) Apache HTTP Server 2.4.65 and earlier with Server Side Includes (SSI) enabled and mod_cgid (but not mod_cgi) passes the shell-escaped query string to #exec cmd="..." directives. (CVE-2025-58098) Apache HTTP Server: CGI environment variable override. (CVE-2025-65082) Apache HTTP Server: mod_userdir+suexec bypass via AllowOverride FileInfo. (CVE-2025-66200)

These are all security issues fixed in the apache2-2.4.66-1.1 package on the GA media of openSUSE Tumbleweed.

This update for apache2 fixes the following issues:

• CVE-2025-55753: Fixed mod_md (ACME), unintended retry intervals (bsc#1254511)
• CVE-2025-58098: Fixed Server Side Includes adds query string to #exec cmd (bsc#1254512)
• CVE-2025-65082: Fixed CGI environment variable override (bsc#1254514)
• CVE-2025-66200: Fixed mod_userdir+suexec bypass via AllowOverride FileInfo (bsc#1254515)

This update for apache2 fixes the following issues:

Changes in apache2:

Version update to 2.4.66 (jsc#PED-16181)

*) SECURITY: CVE-2025-66200: Apache HTTP Server: mod_userdir+suexec bypass via AllowOverride FileInfo. mod_userdir+suexec bypass via AllowOverride FileInfo vulnerability in Apache HTTP Server. Users with access to use the RequestHeader directive in htaccess can cause some CGI scripts to run under an unexpected userid. This issue affects Apache HTTP Server: from 2.4.7 through 2.4.65. *) SECURITY: CVE-2025-65082: Apache HTTP Server: CGI environment variable override. Improper Neutralization of Escape, Meta, or Control Sequences vulnerability in Apache HTTP Server through environment variables set via the Apache configuration unexpectedly superseding variables calculated by the server for CGI programs. This issue affects Apache HTTP Server from 2.4.0 through 2.4.65. *) SECURITY: CVE-2025-59775: Apache HTTP Server: NTLM Leakage on Windows through UNC SSRF. Server-Side Request Forgery (SSRF) vulnerability in Apache HTTP Server on Windows with AllowEncodedSlashes On and MergeSlashes Off allows to potentially leak NTLM hashes to a malicious server via SSRF and malicious requests or content *) SECURITY: CVE-2025-58098: Apache HTTP Server: Server Side Includes adds query string to #exec cmd=... Apache HTTP Server 2.4.65 and earlier with Server Side Includes (SSI) enabled and mod_cgid (but not mod_cgi) passes the shell-escaped query string to #exec cmd="..." directives. This issue affects Apache HTTP Server before 2.4.66. *) SECURITY: CVE-2025-55753: Apache HTTP Server: mod_md (ACME), unintended retry intervals An integer overflow in the case of failed ACME certificate renewal leads, after a number of failures (~30 days in default configurations), to the backoff timer becoming 0. Attempts to renew the certificate then are repeated without delays until it succeeds. This issue affects Apache HTTP Server: from 2.4.30 before 2.4.66. *) mod_http2: Fix handling of 304 responses from mod_cache. *) mod_http2/mod_proxy_http2: fix a bug in calculating the log2 value of integers, used in push diaries and proxy window size calculations. *) mod_md: update to version 2.6.5 - New directive MDInitialDelay, controlling how longer to wait after a server restart before checking certificates for renewal. [Michael Kaufmann] - Hardening: when build with OpenSSL older than 1.0.2 or old libressl versions, the parsing of ASN.1 time strings did not do a length check. - Hardening: when reading back OCSP responses stored in the local JSON store, missing 'valid' key led to uninitialized values, resulting in wrong refresh behaviour. *) mod_md: update to version 2.6.6 - Fix a small memory leak when using OpenSSL's BIGNUMs. - Fix reuse of curl easy handles by resetting them. *) mod_http2: update to version 2.0.35 New directive H2MaxStreamErrors to control how much bad behaviour by clients is tolerated before the connection is closed. *) mod_proxy_http2: add support for ProxyErrorOverride directive. *) mpm_common: Add new ListenTCPDeferAccept directive that allows to specify the value set for the TCP_DEFER_ACCEPT socket option on listen sockets. *) mod_ssl: Add SSLVHostSNIPolicy directive to control the virtual host compatibility policy. *) mod_md: update to version 2.6.2 - Fix error retry delay calculation to not already doubling the wait on the first error. *) mod_md: update to version 2.6.1 - Increasing default MDRetryDelay to 30 seconds to generate less bursty traffic on errored renewals for the ACME CA. This leads to error retries of 30s, 1 minute, 2, 4, etc. up to daily attempts. - Checking that configuring MDRetryDelay will result in a…

This update for apache2 fixes the following issues:

• CVE-2025-55753: Fixed mod_md (ACME) unintended retry intervals (bsc#1254511)
• CVE-2025-65082: Fixed CGI environment variable override (bsc#1254514)
• CVE-2025-58098: Fixed Server Side Includes adding query string to #exec cmd=... (bsc#1254512)
• CVE-2025-66200: Fixed mod_userdir+suexec bypass via AllowOverride FileInfo (bsc#1254515)

This update for apache2 fixes the following issues:

• CVE-2025-55753: Fixed mod_md (ACME) unintended retry intervals (bsc#1254511)
• CVE-2025-65082: Fixed CGI environment variable override (bsc#1254514)
• CVE-2025-58098: Fixed Server Side Includes adding query string to #exec cmd=... (bsc#1254512)
• CVE-2025-66200: Fixed mod_userdir+suexec bypass via AllowOverride FileInfo (bsc#1254515)

This update for apache2 fixes the following issues:

• CVE-2025-55753: Fixed mod_md (ACME) unintended retry intervals (bsc#1254511)
• CVE-2025-65082: Fixed CGI environment variable override (bsc#1254514)
• CVE-2025-58098: Fixed Server Side Includes adding query string to #exec cmd=... (bsc#1254512)
• CVE-2025-66200: Fixed mod_userdir+suexec bypass via AllowOverride FileInfo (bsc#1254515)

This update for apache2 fixes the following issues:

• CVE-2025-55753: Fixed mod_md (ACME) unintended retry intervals (bsc#1254511)
• CVE-2025-65082: Fixed CGI environment variable override (bsc#1254514)
• CVE-2025-58098: Fixed Server Side Includes adding query string to #exec cmd=... (bsc#1254512)
• CVE-2025-66200: Fixed mod_userdir+suexec bypass via AllowOverride FileInfo (bsc#1254515)

This update for apache2 fixes the following issues:

• CVE-2025-55753: Fixed mod_md (ACME), unintended retry intervals (bsc#1254511)
• CVE-2025-58098: Fixed Server Side Includes adds query string to #exec cmd (bsc#1254512)
• CVE-2025-65082: Fixed CGI environment variable override (bsc#1254514)
• CVE-2025-66200: Fixed mod_userdir+suexec bypass via AllowOverride FileInfo (bsc#1254515)

This update for apache2 fixes the following issues:

Changes in apache2:

Version update to 2.4.66 (jsc#PED-16181)

*) SECURITY: CVE-2025-66200: Apache HTTP Server: mod_userdir+suexec bypass via AllowOverride FileInfo. mod_userdir+suexec bypass via AllowOverride FileInfo vulnerability in Apache HTTP Server. Users with access to use the RequestHeader directive in htaccess can cause some CGI scripts to run under an unexpected userid. This issue affects Apache HTTP Server: from 2.4.7 through 2.4.65. *) SECURITY: CVE-2025-65082: Apache HTTP Server: CGI environment variable override. Improper Neutralization of Escape, Meta, or Control Sequences vulnerability in Apache HTTP Server through environment variables set via the Apache configuration unexpectedly superseding variables calculated by the server for CGI programs. This issue affects Apache HTTP Server from 2.4.0 through 2.4.65. *) SECURITY: CVE-2025-59775: Apache HTTP Server: NTLM Leakage on Windows through UNC SSRF. Server-Side Request Forgery (SSRF) vulnerability in Apache HTTP Server on Windows with AllowEncodedSlashes On and MergeSlashes Off allows to potentially leak NTLM hashes to a malicious server via SSRF and malicious requests or content *) SECURITY: CVE-2025-58098: Apache HTTP Server: Server Side Includes adds query string to #exec cmd=... Apache HTTP Server 2.4.65 and earlier with Server Side Includes (SSI) enabled and mod_cgid (but not mod_cgi) passes the shell-escaped query string to #exec cmd="..." directives. This issue affects Apache HTTP Server before 2.4.66. *) SECURITY: CVE-2025-55753: Apache HTTP Server: mod_md (ACME), unintended retry intervals An integer overflow in the case of failed ACME certificate renewal leads, after a number of failures (~30 days in default configurations), to the backoff timer becoming 0. Attempts to renew the certificate then are repeated without delays until it succeeds. This issue affects Apache HTTP Server: from 2.4.30 before 2.4.66. *) mod_http2: Fix handling of 304 responses from mod_cache. *) mod_http2/mod_proxy_http2: fix a bug in calculating the log2 value of integers, used in push diaries and proxy window size calculations. *) mod_md: update to version 2.6.5 - New directive MDInitialDelay, controlling how longer to wait after a server restart before checking certificates for renewal. [Michael Kaufmann] - Hardening: when build with OpenSSL older than 1.0.2 or old libressl versions, the parsing of ASN.1 time strings did not do a length check. - Hardening: when reading back OCSP responses stored in the local JSON store, missing 'valid' key led to uninitialized values, resulting in wrong refresh behaviour. *) mod_md: update to version 2.6.6 - Fix a small memory leak when using OpenSSL's BIGNUMs. - Fix reuse of curl easy handles by resetting them. *) mod_http2: update to version 2.0.35 New directive H2MaxStreamErrors to control how much bad behaviour by clients is tolerated before the connection is closed. *) mod_proxy_http2: add support for ProxyErrorOverride directive. *) mpm_common: Add new ListenTCPDeferAccept directive that allows to specify the value set for the TCP_DEFER_ACCEPT socket option on listen sockets. *) mod_ssl: Add SSLVHostSNIPolicy directive to control the virtual host compatibility policy. *) mod_md: update to version 2.6.2 - Fix error retry delay calculation to not already doubling the wait on the first error. *) mod_md: update to version 2.6.1 - Increasing default MDRetryDelay to 30 seconds to generate less bursty traffic on errored renewals for the ACME CA. This leads to error retries of 30s, 1 minute, 2, 4, etc. up to daily attempts. - Checking that configuring MDRetryDelay will result in a…

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).

It was discovered that the Apache HTTP Server incorrectly handled failed ACME certificate renewals. This could result in renewal attempts to be repeated without delays, possibly leading to a denial of service. (CVE-2025-55753)

Anthony Parfenov discovered that the Apache HTTP Server would pass the query string to cmd directives when configured with Server Side Includes (SSI) enabled and mod_cgid. An attacker could possibly use this issue to execute arbitrary code. (CVE-2025-58098)

Mattias Åsander discovered that the Apache HTTP Server incorrectly neutralized certain environment variables. This could result in unexpectedly superseding variables calculated by the server for CGI programs. (CVE-2025-65082)

Mattias Åsander discovered that the Apache HTTP Server incorrectly handled AllowOverride FileInfo configurations when using mod_userdir with suexec. An attacker with access to use the RequestHeader directive in htaccess can cause some CGI scripts to run under an unexpected userid. (CVE-2025-66200)

It was discovered that Apache HTTP Server incorrectly handled certain response headers. An attacker could possibly use this issue to perform HTTP response splitting attacks. This issue only affected Ubuntu 14.04 LTS. (CVE-2023-38709)

Will Dormann and David Warren discovered that Apache HTTP Server's HTTP/2 implementation did not properly reclaim memory when streams were reset by clients. A remote attacker could possibly use this issue to cause Apache HTTP Server to consume resources, leading to a denial of service. This issue only affected Ubuntu 18.04 LTS. (CVE-2023-45802)

Keran Mu and Jianjun Chen discovered that Apache HTTP Server incorrectly handled certain response headers. An attacker could possibly use this issue to perform HTTP response splitting attacks. This issue only affected Ubuntu 14.04 LTS. (CVE-2024-24795)

Orange Tsai discovered that Apache HTTP Server mod_proxy incorrectly handled URL encoding. A remote attacker could possibly use this issue to bypass authentication via crafted requests. This issue only affected Ubuntu 16.04 LTS and Ubuntu 18.04 LTS. (CVE-2024-38473)

Orange Tsai discovered that Apache HTTP Server could be caused to perform server-side request forgery (SSRF) via malicious backend response headers. A remote attacker could possibly use this issue to conduct SSRF attacks or disclose sensitive information. This issue only affected Ubuntu 14.04 LTS. (CVE-2024-38476)

Orange Tsai discovered that Apache HTTP Server mod_proxy did not properly handle certain null pointer conditions. A remote attacker could possibly use this issue to cause Apache HTTP Server to crash, resulting in a denial of service. This issue only affected Ubuntu 14.04 LTS. (CVE-2024-38477)

Orange Tsai discovered that Apache HTTP Server mod_rewrite could be made to perform server-side request forgery (SSRF) via unsafe RewriteRules. A remote attacker could possibly use this issue to conduct SSRF attacks. This issue only affected Ubuntu 16.04 LTS and Ubuntu 18.04 LTS. (CVE-2024-39573)

It was discovered that Apache HTTP Server incorrectly handled certain response headers. An attacker could possibly use this issue to perform HTTP response splitting attacks. This issue only affected Ubuntu 14.04 LTS. (CVE-2024-42516)

It was discovered that Apache HTTP Server could be caused to perform server-side request forgery (SSRF) via mod_headers modifying Content-Type headers. A remote attacker could possibly use this issue to conduct SSRF attacks. This issue only affected Ubuntu 14.04 LTS. (CVE-2024-43204)

John Runyon discovered that Apache HTTP Server mod_ssl did not properly escape user-supplied data before writing log entries. A remote attacker could possibly use this issue to insert escape sequences into log files. This issue only affected Ubuntu 14.04 LTS. (CVE-2024-47252)

Robert Merget discovered that Apache HTTP Server with SSLEngine optional was vulnerable to HTTP desynchronisation attacks. An attacker in a privileged network position could possibly use this issue to hijack HTTP sessions. This issue only affected Ubuntu 14.04 LTS. (CVE-2025-49812)

It was discovered that Apache HTTP Server mod_md had an integer overflow in the ACME certificate renewal backoff timer. An attacker could possibly use this issue to cause excessive certificate renewal requests. This issue only affected Ubuntu 20.04 LTS. (CVE-2025-55753)

Anthony Parfenov discovered that Apache HTTP Server with SSI enabled and mod_cgid passed shell-escaped query strings to #exec cmd directives. A remote attacker could possibly use this issue to perform command injection. (CVE-2025-58098)

Mattias Åsander discovered that Apache HTTP Server incorrectly gave precedence to environment variables from HTTP headers over server-calculated CGI variables. A remote attacker could possibly use this issue to influence the environment of CGI programs. (CVE-2025-65082)

Mattias Åsander discovered that Apache HTTP Server mod_userdir with suexec could be caused to run CGI scripts under…