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 httpdUpgrade mod_sslUpgrade mod_luaUpgrade httpd-toolsUpgrade httpd-coreUpgrade httpd-develUpgrade httpd-manualUpgrade mod_proxy_htmlUpgrade mod_mdUpgrade mod_http2Upgrade mod_ldapUpgrade httpd-filesystemUpgrade mod_session | Feb 22, 2023 | Jan 17, 2023 |
| Alpine Linux | — | Upgrade apache2 | Aug 22, 2024 | Jan 17, 2023 |
| Amazon Linux Ami 2 | — | Upgrade httpdUpgrade httpd-toolsUpgrade mod_proxy_htmlUpgrade httpd-develUpgrade mod_mdUpgrade mod_sessionUpgrade mod_ldapUpgrade httpd-filesystemUpgrade httpd-debuginfoUpgrade mod_sslUpgrade httpd-manual | Feb 23, 2023 | Jan 17, 2023 |
| Amazon_linux | — | Upgrade httpd24 | Mar 23, 2023 | Jan 17, 2023 |
| Amazon_linux_2023 | — | Upgrade httpd-debuginfoUpgrade mod_sessionUpgrade httpd-debugsourceUpgrade mod_sslUpgrade mod_ldap-debuginfoUpgrade httpd-develUpgrade httpd-coreUpgrade httpdUpgrade mod_proxy_htmlUpgrade httpd-manualUpgrade mod_ldapUpgrade mod_lua-debuginfoUpgrade httpd-filesystemUpgrade mod_session-debuginfoUpgrade httpd-core-debuginfoUpgrade mod_luaUpgrade mod_ssl-debuginfoUpgrade mod_proxy_html-debuginfoUpgrade httpd-toolsUpgrade httpd-tools-debuginfo | 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 httpd-manualUpgrade httpd-tools-debuginfoUpgrade mod_http2-debugsourceUpgrade httpd-debugsourceUpgrade mod_ldapUpgrade mod_lua-debuginfoUpgrade httpd-coreUpgrade mod_luaUpgrade mod_sslUpgrade mod_proxy_html-debuginfoUpgrade httpdUpgrade httpd-core-debuginfoUpgrade httpd-toolsUpgrade mod_sessionUpgrade mod_md-debuginfoUpgrade mod_ssl-debuginfoUpgrade mod_ldap-debuginfoUpgrade mod_http2-debuginfoUpgrade httpd-develUpgrade httpd-debuginfoUpgrade httpd-filesystemUpgrade mod_proxy_htmlUpgrade mod_md-debugsourceUpgrade mod_http2Upgrade mod_session-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 httpdUpgrade httpd-toolsUpgrade httpd-filesystemUpgrade mod_ssl | Mar 20, 2023 | Jan 17, 2023 |
| Huawei Euleros 2_0_sp11 | — | Upgrade httpd-toolsUpgrade mod_sslUpgrade httpdUpgrade httpd-filesystem | May 8, 2023 | Jan 17, 2023 |
| Huawei Euleros 2_0_sp8 | — | Upgrade httpdUpgrade httpd-toolsUpgrade httpd-develUpgrade httpd-manualUpgrade mod_sslUpgrade httpd-filesystemUpgrade mod_session | Apr 13, 2023 | Jan 17, 2023 |
| Huawei Euleros 2_0_sp9 | — | Upgrade httpdUpgrade httpd-toolsUpgrade httpd-filesystemUpgrade mod_ssl | May 10, 2023 | Jan 17, 2023 |
| Ibm Http_server | — | Apply IBM HTTP Server version 8.5.5.24 or laterApply IBM HTTP Server version 9.0.5.15 or laterApply IBM HTTP Server Interim Fix PH51982 | Nov 20, 2025 | Feb 27, 2023 |
| Oracle_linux | — | Upgrade httpd-manualUpgrade httpd-develUpgrade mod_sslUpgrade httpd-coreUpgrade mod_mdUpgrade httpd-toolsUpgrade httpdUpgrade mod_sessionUpgrade mod_luaUpgrade mod_ldapUpgrade httpd-filesystemUpgrade mod_proxy_htmlUpgrade mod_http2 | Feb 23, 2023 | Jan 17, 2023 |
| Redhat_linux | — | Upgrade mod_session-debuginfoUpgrade mod_sessionUpgrade mod_proxy_html-debuginfoUpgrade httpd-debuginfoUpgrade mod_luaUpgrade mod_md-debugsourceUpgrade httpd-filesystemUpgrade mod_mdUpgrade mod_ldapUpgrade mod_ldap-debuginfoUpgrade mod_http2Upgrade mod_proxy_htmlUpgrade mod_ssl-debuginfoUpgrade httpd-coreUpgrade httpd-develUpgrade mod_md-debuginfoUpgrade httpd-manualUpgrade mod_http2-debugsourceUpgrade mod_sslUpgrade httpd-core-debuginfoUpgrade httpd-debugsourceNo solution existsUpgrade httpdUpgrade mod_lua-debuginfoUpgrade httpd-tools-debuginfoUpgrade httpd-toolsUpgrade mod_http2-debuginfo | Feb 22, 2023 | Jan 17, 2023 |
| Rocky_linux | — | Upgrade mod_session-debuginfoUpgrade mod_md-debuginfoUpgrade httpd-develUpgrade httpdUpgrade mod_sslUpgrade mod_proxy_html-debuginfoUpgrade httpd-debuginfoUpgrade mod_ldapUpgrade httpd-core-debuginfoUpgrade mod_proxy_htmlUpgrade httpd-coreUpgrade mod_http2-debuginfoUpgrade mod_mdUpgrade mod_sessionUpgrade httpd-debugsourceUpgrade mod_http2-debugsourceUpgrade mod_ldap-debuginfoUpgrade mod_md-debugsourceUpgrade mod_http2Upgrade httpd-tools-debuginfoUpgrade httpd-toolsUpgrade mod_luaUpgrade mod_lua-debuginfoUpgrade mod_ssl-debuginfo | Mar 12, 2024 | Jan 17, 2023 |
| Suse | — | Upgrade apache2-preforkUpgrade apache2Upgrade apache2-workerUpgrade apache2-example-pagesUpgrade apache2-develUpgrade apache2-utilsUpgrade apache2-eventUpgrade apache2-doc | 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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