CVE-2026-56154
Fixed in a distro release EPSS <1%CVSS 9.8
Use After Free vulnerability in Apache HTTP Server's mod_rewrite when using lookahead (%{LA-U:HTTP:...}) This issue affects Apache HTTP Server: from 2.4.0 through 2.4.68.
Products: Apache Software Foundation Apache HTTP Server
Distro releases
| Release | Package | Fixed in |
|---|---|---|
| AlmaLinux 9 | httpd | 2.4.62-13.el9_8.9 |
| AlmaLinux 9 | httpd-core | 2.4.62-13.el9_8.9 |
| AlmaLinux 9 | httpd-devel | 2.4.62-13.el9_8.9 |
| AlmaLinux 9 | httpd-filesystem | 2.4.62-13.el9_8.9 |
| AlmaLinux 9 | httpd-manual | 2.4.62-13.el9_8.9 |
| AlmaLinux 9 | httpd-tools | 2.4.62-13.el9_8.9 |
| AlmaLinux 9 | mod_ldap | 2.4.62-13.el9_8.9 |
| AlmaLinux 9 | mod_lua | 2.4.62-13.el9_8.9 |
| AlmaLinux 9 | mod_proxy_html | 1:2.4.62-13.el9_8.9 |
| AlmaLinux 9 | mod_session | 2.4.62-13.el9_8.9 |
| AlmaLinux 9 | mod_ssl | 1:2.4.62-13.el9_8.9 |
| Alpine 3.21 | apache2 | 2.4.69-r0 |
| Alpine 3.22 | apache2 | 2.4.69-r0 |
| Alpine 3.23 | apache2 | 2.4.69-r0 |
| Alpine 3.24 | apache2 | 2.4.69-r0 |
| Debian 12 | apache2 | no fix |
| Debian 13 | apache2 | 2.4.69-1~deb13u1 |
| Debian 14 | apache2 | 2.4.69-1 |
| Red Hat hummingbird 1 | httpd | 0:2.4.69-1.hum1 |
| Red Hat hummingbird 1 | httpd-core | 0:2.4.69-1.hum1 |
| Red Hat hummingbird 1 | httpd-devel | 0:2.4.69-1.hum1 |
| Red Hat hummingbird 1 | httpd-filesystem | 0:2.4.69-1.hum1 |
| Red Hat hummingbird 1 | httpd-manual | 0:2.4.69-1.hum1 |
| Red Hat hummingbird 1 | httpd-tools | 0:2.4.69-1.hum1 |
| Red Hat hummingbird 1 | mod_ldap | 0:2.4.69-1.hum1 |
| Red Hat hummingbird 1 | mod_lua | 0:2.4.69-1.hum1 |
| Red Hat hummingbird 1 | mod_proxy_html | 0:2.4.69-1.hum1 |
| Red Hat hummingbird 1 | mod_session | 0:2.4.69-1.hum1 |
| Red Hat hummingbird 1 | mod_ssl | 0:2.4.69-1.hum1 |
| Rocky Linux 9 | httpd | 0:2.4.62-13.el9_8.9 |
| Ubuntu 22.04 LTS | apache2 | 2.4.52-1ubuntu4.24 |
| Ubuntu 24.04 LTS | apache2 | 2.4.58-1ubuntu8.16 |
| Ubuntu 26.04 LTS | apache2 | 2.4.66-2ubuntu2.5 |
| Ubuntu 26.10 | apache2 | no fix |
| Ubuntu Pro 14.04 LTS | apache2 | 2.4.7-1ubuntu4.22+esm16 |
| Ubuntu Pro 16.04 LTS | apache2 | 2.4.18-2ubuntu3.17+esm21 |
| Ubuntu Pro 18.04 LTS | apache2 | 2.4.29-1ubuntu4.27+esm12 |
| Ubuntu Pro 20.04 LTS | apache2 | 2.4.41-4ubuntu3.23+esm8 |