CVE-2026-56154

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.

Score

CVSS 3.1 9.8 Critical

Status

Analyzed - security@apache.org

Published

2026-10-01

Last modified

2026-10-05

Weaknesses

CWE-416

Affected products

• Http Server (Apache)
• Apache Http Server (Apache Software Foundation)

References

• https://httpd.apache.org/security/vulnerabilities_24.html
• http://www.openwall.com/lists/oss-security/2026/10/01/17