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Insufficient escaping of user-supplied data in mod_ssl in Apache HTTP Server 2.4.63 and earlier allows an untrusted SSL/TLS client to insert escape characters into log files in some configurations.
In a logging configuration where CustomLog is used with "%{varname}x" or "%{varname}c" to log variables provided by mod_ssl such as SSL_TLS_SNI, no escaping is performed by either mod_log_config or mod_ssl and unsanitized data provided by the client may appear in log files.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alma_linux | — | Upgrade httpd-develUpgrade mod_luaUpgrade mod_sessionUpgrade httpdUpgrade mod_ldapUpgrade httpd-filesystemUpgrade httpd-manualUpgrade mod_sslUpgrade httpd-toolsUpgrade mod_http2Upgrade mod_mdUpgrade httpd-coreUpgrade mod_proxy_html | Sep 5, 2025 | Sep 3, 2025 |
| Alpine Linux | — | Upgrade apache2 | Aug 8, 2025 | Jul 10, 2025 |
| Amazon Linux Ami 2 | — | Upgrade httpd-filesystemUpgrade httpd-develUpgrade mod_mdUpgrade httpd-toolsUpgrade mod_proxy_htmlUpgrade httpdUpgrade httpd-manualUpgrade mod_ldapUpgrade mod_sslUpgrade httpd-debuginfoUpgrade mod_session | May 20, 2026 | May 20, 2026 |
| Amazon_linux_2023 | — | Upgrade httpd-core-debuginfoUpgrade mod_sslUpgrade mod_lua-debuginfoUpgrade httpd-debugsourceUpgrade httpd-toolsUpgrade httpdUpgrade httpd-coreUpgrade httpd-manualUpgrade httpd-develUpgrade httpd-tools-debuginfoUpgrade mod_proxy_htmlUpgrade mod_sessionUpgrade mod_session-debuginfoUpgrade httpd-filesystemUpgrade httpd-debuginfoUpgrade mod_ldapUpgrade mod_luaUpgrade mod_proxy_html-debuginfoUpgrade mod_ssl-debuginfoUpgrade mod_ldap-debuginfo | Aug 5, 2025 | Jul 14, 2025 |
| Apache Httpd | — | Upgrade to the latest version of Apache HTTPD | Jul 18, 2025 | Jul 10, 2025 |
| Debian | — | Upgrade apache2 | Jul 14, 2025 | Jul 10, 2025 |
| Freebsd | — | Upgrade apache24 | Jul 13, 2025 | Jul 11, 2025 |
| Gentoo Linux | — | Upgrade www-servers/apache. | Aug 16, 2026 | Aug 13, 2026 |
| Huawei Euleros 2_0_sp10 | — | Upgrade mod_sslUpgrade httpd-toolsUpgrade httpdUpgrade httpd-filesystem | Sep 15, 2025 | Sep 9, 2025 |
| Huawei Euleros 2_0_sp11 | — | Upgrade httpdUpgrade httpd-toolsUpgrade httpd-filesystemUpgrade mod_ssl | Oct 14, 2025 | Sep 9, 2025 |
| Huawei Euleros 2_0_sp12 | — | Upgrade httpd-filesystemUpgrade httpd-toolsUpgrade mod_sslUpgrade httpd | Sep 15, 2025 | Sep 9, 2025 |
| Huawei Euleros 2_0_sp13 | — | Upgrade httpdUpgrade httpd-filesystemUpgrade mod_sslUpgrade httpd-tools | Oct 24, 2025 | Sep 9, 2025 |
| Oracle Httpserver | — | Apply patch 38856415 to Oracle HTTP Server 12.2.1.4.0.Apply patch 38853418 to Oracle HTTP Server 14.1.2.0.0. | Sep 30, 2026 | Jul 10, 2025 |
| Oracle_linux | — | Upgrade httpd-manualUpgrade mod_sslUpgrade mod_http2Upgrade mod_mdUpgrade httpd-coreUpgrade httpd-develUpgrade mod_sessionUpgrade mod_proxy_htmlUpgrade mod_luaUpgrade httpd-toolsUpgrade httpdUpgrade mod_ldapUpgrade httpd-filesystem | Sep 3, 2025 | Jul 14, 2025 |
| Redhat_linux | — | Upgrade mod_ldapUpgrade mod_md-debuginfoUpgrade mod_proxy_htmlUpgrade mod_session-debuginfoUpgrade mod_sessionUpgrade mod_sslUpgrade httpd-core-debuginfoUpgrade httpd-filesystemUpgrade httpd-debugsourceUpgrade mod_proxy_html-debuginfoUpgrade mod_http2Upgrade mod_lua-debuginfoUpgrade mod_luaUpgrade mod_http2-debuginfoUpgrade httpdUpgrade httpd-debuginfoUpgrade httpd-toolsUpgrade httpd-manualUpgrade mod_md-debugsourceUpgrade httpd-develUpgrade httpd-coreUpgrade mod_ssl-debuginfoUpgrade mod_ldap-debuginfoNo solution existsUpgrade mod_http2-debugsourceUpgrade mod_mdUpgrade httpd-tools-debuginfo | Jul 15, 2025 | Jul 10, 2025 |
| Rocky_linux | — | Upgrade httpd-toolsUpgrade mod_sessionUpgrade httpd-develUpgrade httpd-coreUpgrade mod_md-debuginfoUpgrade mod_proxy_htmlUpgrade mod_mdUpgrade mod_http2-debugsourceUpgrade httpd-debugsourceUpgrade mod_sslUpgrade mod_http2-debuginfoUpgrade mod_ldap-debuginfoUpgrade mod_http2Upgrade httpd-core-debuginfoUpgrade mod_ssl-debuginfoUpgrade mod_proxy_html-debuginfoUpgrade httpd-debuginfoUpgrade httpdUpgrade mod_luaUpgrade mod_md-debugsourceUpgrade mod_session-debuginfoUpgrade mod_lua-debuginfoUpgrade httpd-tools-debuginfoUpgrade mod_ldap | Feb 5, 2026 | Sep 8, 2025 |
| Suse | — | Upgrade apache2-tls13-develUpgrade apache2-preforkUpgrade apache2-tls13-utilsUpgrade apache2-tls13-example-pagesUpgrade apache2-tls13Upgrade apache2-tls13-preforkUpgrade apache2-eventUpgrade apache2-docUpgrade apache2-utilsUpgrade apache2Upgrade apache2-workerUpgrade apache2-example-pagesUpgrade apache2-tls13-docUpgrade apache2-tls13-workerUpgrade apache2-manualUpgrade apache2-devel | Feb 19, 2026 | Sep 9, 2025 |
| Ubuntu | — | Upgrade apache2 (Ubuntu Pro)Upgrade apache2 | Jul 17, 2025 | Jul 10, 2025 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Aug 11, 2025 | Jul 10, 2025 |
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