> USN-8898-1: Apache HTTP Server vulnerabilities

It was discovered that Apache HTTP Server's mod_rewrite module incorrectly handled memory when performing certain variable lookups. A remote attacker could possibly use this issue to cause a denial of service or execute arbitrary code. (CVE-2026-56154) Lucian Nitescu, Simon Kappel, and Gianluca Danesin discovered that Apache HTTP Server's mod_http2 module incorrectly handled memory when processing certain HTTP/2 connections. A remote attacker could possibly use this issue to cause a denial of service or execute arbitrary code. This issue only affected Ubuntu 18.04 LTS, Ubuntu 20.04 LTS, Ubuntu 22.04 LTS, Ubuntu 24.04 LTS, and Ubuntu 26.04 LTS. (CVE-2026-57941) Juthawong Naisanguansee, Charles Vosburgh, Mike Read, and Ryoma Nishioka discovered that Apache HTTP Server's mod_ssl module incorrectly handled certain expressions. An attacker could possibly use this issue to bypass intended access restrictions. (CVE-2026-59797)