Prior to Apache HTTP Server 2.4.55, a malicious backend can cause the response headers to be truncated early, resulting in some headers being incorporated into the response body. If the later headers have any security purpose, they will not be interpreted by the client.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alma_linux | — | Upgrade mod_luaUpgrade httpd-develUpgrade mod_sslUpgrade httpd-toolsUpgrade httpdUpgrade httpd-coreUpgrade httpd-manualUpgrade mod_proxy_htmlUpgrade mod_sessionUpgrade mod_ldapUpgrade mod_mdUpgrade httpd-filesystemUpgrade mod_http2 | Feb 22, 2023 | Jan 17, 2023 |
| Alpine Linux | — | Upgrade apache2 | Aug 22, 2024 | Jan 17, 2023 |
| Amazon Linux Ami 2 | — | Upgrade httpd-debuginfoUpgrade httpd-filesystemUpgrade mod_sslUpgrade mod_ldapUpgrade mod_sessionUpgrade httpd-manualUpgrade mod_proxy_htmlUpgrade mod_mdUpgrade httpd-toolsUpgrade httpdUpgrade httpd-devel | Feb 23, 2023 | Jan 17, 2023 |
| Amazon_linux | — | Upgrade httpd24 | Mar 23, 2023 | Jan 17, 2023 |
| Amazon_linux_2023 | — | Upgrade mod_proxy_html-debuginfoUpgrade mod_ssl-debuginfoUpgrade httpd-tools-debuginfoUpgrade httpd-toolsUpgrade mod_ldapUpgrade mod_lua-debuginfoUpgrade httpd-core-debuginfoUpgrade mod_luaUpgrade mod_session-debuginfoUpgrade httpd-filesystemUpgrade httpd-manualUpgrade mod_ldap-debuginfoUpgrade httpdUpgrade httpd-debuginfoUpgrade httpd-develUpgrade mod_proxy_htmlUpgrade mod_sslUpgrade httpd-coreUpgrade mod_sessionUpgrade httpd-debugsource | Feb 17, 2025 | Jan 17, 2023 |
| Apache Httpd | — | Upgrade to the latest version of Apache HTTPD | Nov 29, 2023 | Jan 17, 2023 |
| Arch Linux | — | Upgrade to the latest version of Arch Linux | Jul 11, 2025 | Jan 17, 2023 |
| Centos_linux | — | Upgrade mod_luaUpgrade mod_sslUpgrade httpd-debugsourceUpgrade httpd-toolsUpgrade mod_lua-debuginfoUpgrade httpd-manualUpgrade mod_sessionUpgrade httpdUpgrade httpd-core-debuginfoUpgrade mod_md-debuginfoUpgrade mod_http2-debugsourceUpgrade httpd-coreUpgrade mod_ldapUpgrade mod_proxy_html-debuginfoUpgrade httpd-tools-debuginfoUpgrade mod_session-debuginfoUpgrade mod_ssl-debuginfoUpgrade mod_ldap-debuginfoUpgrade httpd-develUpgrade httpd-debuginfoUpgrade mod_md-debugsourceUpgrade mod_http2Upgrade httpd-filesystemUpgrade mod_proxy_htmlUpgrade mod_http2-debuginfoUpgrade mod_md | Feb 22, 2023 | Jan 17, 2023 |
| Debian | — | Upgrade apache2 | Mar 6, 2023 | Jan 17, 2023 |
| F5 Big Ip | — | Update F5 BIG-IP to the latest version | Jun 17, 2026 | Feb 22, 2023 |
| Freebsd | — | Upgrade apache24 | Jan 19, 2023 | Jan 17, 2023 |
| Gentoo Linux | — | Upgrade www-servers/apache. | Sep 11, 2023 | Jan 17, 2023 |
| Huawei Euleros 2_0_sp10 | — | Upgrade httpd-filesystemUpgrade httpd-toolsUpgrade mod_sslUpgrade httpd | Mar 20, 2023 | Jan 17, 2023 |
| Huawei Euleros 2_0_sp11 | — | Upgrade mod_sslUpgrade httpdUpgrade httpd-toolsUpgrade httpd-filesystem | May 8, 2023 | Jan 17, 2023 |
| Huawei Euleros 2_0_sp8 | — | Upgrade httpd-toolsUpgrade mod_sslUpgrade httpd-manualUpgrade httpd-develUpgrade httpdUpgrade httpd-filesystemUpgrade mod_session | Apr 13, 2023 | Jan 17, 2023 |
| Huawei Euleros 2_0_sp9 | — | Upgrade httpd-toolsUpgrade httpdUpgrade mod_sslUpgrade httpd-filesystem | May 10, 2023 | Jan 17, 2023 |
| Ibm Http_server | — | Apply IBM HTTP Server version 8.5.5.24 or laterApply IBM HTTP Server Interim Fix PH51982Apply IBM HTTP Server version 9.0.5.15 or later | Nov 20, 2025 | Feb 27, 2023 |
| Oracle_linux | — | Upgrade mod_proxy_htmlUpgrade mod_http2Upgrade mod_ldapUpgrade mod_sessionUpgrade mod_luaUpgrade httpd-filesystemUpgrade httpdUpgrade mod_mdUpgrade httpd-coreUpgrade mod_sslUpgrade httpd-toolsUpgrade httpd-develUpgrade httpd-manual | Feb 23, 2023 | Jan 17, 2023 |
| Redhat_linux | — | Upgrade mod_http2Upgrade httpd-debuginfoUpgrade mod_ldap-debuginfoUpgrade mod_sessionUpgrade mod_mdUpgrade mod_luaUpgrade mod_md-debugsourceUpgrade mod_session-debuginfoUpgrade mod_proxy_html-debuginfoUpgrade httpd-filesystemUpgrade mod_ssl-debuginfoUpgrade mod_proxy_htmlUpgrade mod_ldapUpgrade httpd-core-debuginfoUpgrade mod_sslUpgrade httpd-tools-debuginfoUpgrade httpd-develNo solution existsUpgrade httpd-coreUpgrade httpd-debugsourceUpgrade httpd-manualUpgrade httpd-toolsUpgrade mod_lua-debuginfoUpgrade httpdUpgrade mod_http2-debugsourceUpgrade mod_http2-debuginfoUpgrade mod_md-debuginfo | Feb 22, 2023 | Jan 17, 2023 |
| Rocky_linux | — | Upgrade httpd-toolsUpgrade mod_ssl-debuginfoUpgrade mod_md-debugsourceUpgrade mod_lua-debuginfoUpgrade mod_luaUpgrade httpd-tools-debuginfoUpgrade mod_http2Upgrade httpd-coreUpgrade httpd-core-debuginfoUpgrade httpd-debugsourceUpgrade mod_ldap-debuginfoUpgrade httpd-develUpgrade mod_proxy_html-debuginfoUpgrade mod_proxy_htmlUpgrade mod_session-debuginfoUpgrade mod_sslUpgrade mod_ldapUpgrade mod_http2-debuginfoUpgrade httpdUpgrade mod_md-debuginfoUpgrade httpd-debuginfoUpgrade mod_sessionUpgrade mod_http2-debugsourceUpgrade mod_md | Mar 12, 2024 | Jan 17, 2023 |
| Suse | — | Upgrade apache2-workerUpgrade apache2-example-pagesUpgrade apache2-preforkUpgrade apache2Upgrade apache2-docUpgrade apache2-develUpgrade apache2-eventUpgrade apache2-utils | Jan 30, 2023 | Jan 17, 2023 |
| Ubuntu | — | Upgrade apache2 (Ubuntu Pro)Upgrade apache2 | Mar 22, 2023 | Jan 17, 2023 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Jan 20, 2025 | Jan 17, 2023 |
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