CVE-2026-56154: Apache HTTP Server

Critical severity, CVSS 9.8. EPSS: 0.6% chance of exploitation in the next 30 days.

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.

Affected products

• Apache HTTP Server: from 2.4.0, before 2.4.69 (fixed in 2.4.69)

Published 2026-10-01. Last modified 2026-10-05.