CVE-2026-56154 Apache HTTP Server: mod_rewrite use-after-free via %{LA-U:HTTP:...}

Use After Free vulnerability in Apache HTTP Server's modrewrite when using lookahead %LA-U:HTTP:... This issue affects Apache HTTP Server: from 2.4.0 through 2.4.68...

CVE-2026-56154

A Use After Free vulnerability exists in the mod_rewrite module of the Apache HTTP Server (versions 2.4.0 through 2.4.68 ). The flaw is triggered when using lookahead functionality, specifically via the %{LA-U:HTTP:...} syntax. While the CVSS 3.1 score indicates a CRITICAL severity of 9.8 with po...