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.
CVSS Details
- CVSS 3.1 Base Score: 6.5
- CVSS 3.1 Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alma_linux | — | Upgrade httpd-toolsUpgrade httpdUpgrade mod_luaUpgrade httpd-develUpgrade mod_proxy_htmlUpgrade mod_ldapUpgrade httpd-filesystemUpgrade mod_sessionUpgrade httpd-coreUpgrade mod_http2Upgrade httpd-manualUpgrade mod_sslUpgrade mod_md | Dec 23, 2025 | Dec 22, 2025 |
| Alpine Linux | — | Upgrade apache2 | Dec 8, 2025 | Dec 5, 2025 |
| Amazon Linux Ami 2 | — | Upgrade mod_proxy_htmlUpgrade httpd-toolsUpgrade httpd-manualUpgrade mod_ldapUpgrade httpd-debuginfoUpgrade mod_sessionUpgrade mod_mdUpgrade httpdUpgrade mod_sslUpgrade httpd-filesystemUpgrade httpd-devel | May 20, 2026 | May 20, 2026 |
| Amazon_linux_2023 | — | Upgrade httpd-core-debuginfoUpgrade httpd-toolsUpgrade httpd-debugsourceUpgrade httpd-develUpgrade mod_lua-debuginfoUpgrade httpdUpgrade httpd-coreUpgrade mod_ldap-debuginfoUpgrade httpd-manualUpgrade mod_sslUpgrade mod_ldapUpgrade mod_session-debuginfoUpgrade mod_proxy_html-debuginfoUpgrade httpd-filesystemUpgrade mod_sessionUpgrade mod_ssl-debuginfoUpgrade httpd-debuginfoUpgrade mod_luaUpgrade httpd-tools-debuginfoUpgrade mod_proxy_html | Jan 12, 2026 | Dec 5, 2025 |
| Apache Httpd | — | Upgrade to the latest version of Apache HTTPD | Dec 8, 2025 | Dec 5, 2025 |
| Apple Osx Apache | — | Upgrade macOS to the latest version | Mar 27, 2026 | Mar 24, 2026 |
| Debian | — | Upgrade apache2 | Jan 12, 2026 | Jan 12, 2026 |
| Freebsd | — | Upgrade apache24 | Dec 10, 2025 | Dec 4, 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 | Mar 17, 2026 | Mar 17, 2026 |
| Huawei Euleros 2_0_sp11 | — | Upgrade httpd-toolsUpgrade httpd-filesystemUpgrade mod_sslUpgrade httpd | Mar 17, 2026 | Mar 17, 2026 |
| Huawei Euleros 2_0_sp12 | — | Upgrade httpd-filesystemUpgrade httpd-toolsUpgrade mod_sslUpgrade httpd | Mar 17, 2026 | Mar 17, 2026 |
| Huawei Euleros 2_0_sp13 | — | Upgrade httpd-toolsUpgrade httpd-filesystemUpgrade httpdUpgrade mod_ssl | Mar 10, 2026 | Mar 10, 2026 |
| Ibm Http_server | — | Apply IBM HTTP Server Interim Fix PH68462Apply IBM HTTP Server version 9.0.5.27 or laterApply IBM HTTP Server version 8.5.5.29 or later | Mar 25, 2026 | Dec 15, 2025 |
| Oracle_linux | — | Upgrade mod_mdUpgrade httpd-filesystemUpgrade httpd-manualUpgrade httpd-coreUpgrade mod_ldapUpgrade mod_sessionUpgrade mod_http2Upgrade mod_sslUpgrade mod_proxy_htmlUpgrade httpd-toolsUpgrade mod_luaUpgrade httpdUpgrade httpd-devel | Dec 24, 2025 | Dec 5, 2025 |
| Redhat_linux | — | Upgrade httpd-coreUpgrade mod_http2-debuginfoUpgrade mod_lua-debuginfoUpgrade httpd-core-debuginfoUpgrade httpd-debuginfoUpgrade httpd-manualUpgrade mod_proxy_html-debuginfoUpgrade mod_md-debuginfoUpgrade mod_http2-debugsourceUpgrade mod_ldap-debuginfoUpgrade httpd-debugsourceUpgrade mod_sslUpgrade mod_mdUpgrade httpdUpgrade mod_ldapUpgrade mod_sessionUpgrade mod_luaUpgrade mod_md-debugsourceUpgrade mod_http2Upgrade mod_session-debuginfoUpgrade httpd-develUpgrade mod_ssl-debuginfoUpgrade mod_proxy_htmlUpgrade httpd-filesystemNo solution existsUpgrade httpd-tools-debuginfoUpgrade httpd-tools | Dec 23, 2025 | Dec 5, 2025 |
| Rocky_linux | — | Upgrade mod_md-debugsourceUpgrade mod_sslUpgrade httpd-debuginfoUpgrade httpd-coreUpgrade httpd-develUpgrade mod_http2-debugsourceUpgrade mod_proxy_htmlUpgrade mod_http2-debuginfoUpgrade mod_ldap-debuginfoUpgrade httpd-debugsourceUpgrade httpdUpgrade mod_sessionUpgrade mod_md-debuginfoUpgrade mod_mdUpgrade mod_http2Upgrade mod_ldapUpgrade mod_proxy_html-debuginfoUpgrade mod_lua-debuginfoUpgrade mod_session-debuginfoUpgrade httpd-toolsUpgrade httpd-core-debuginfoUpgrade mod_luaUpgrade httpd-tools-debuginfoUpgrade mod_ssl-debuginfo | Feb 5, 2026 | Dec 24, 2025 |
| Ubuntu | — | Upgrade apache2Upgrade apache2 (Ubuntu Pro) | Jan 20, 2026 | Dec 5, 2025 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Feb 9, 2026 | Dec 5, 2025 |
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