What is GHSA-f5cw-5j88-wxxc?

GHSA-f5cw-5j88-wxxc is a security advisory published by GitHub Security Advisories with Critical severity. Use After Free vulnerability in Apache HTTP Server's mod_rewrite when using lookahead (%{LA-U...

Which CVE IDs does GHSA-f5cw-5j88-wxxc cover?

GHSA-f5cw-5j88-wxxc covers the following CVE IDs: CVE-2026-56154. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of GHSA-f5cw-5j88-wxxc?

GHSA-f5cw-5j88-wxxc has a CVSS v3 base score of 9.8, published by GitHub Security Advisories.

GHSA-f5cw-5j88-wxxcCriticalCVSS 9.8

Use After Free vulnerability in Apache HTTP Server's mod_rewrite when using lookahead (%{LA-U...

Vendor

GitHub Security Advisories

Published

October 1, 2026

Last Modified

October 1, 2026

🔗 CVE IDs covered (1)

CVE-2026-56154 →

📋 Description

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.

🔗 References (4)

https://nvd.nist.gov/vuln/detail/CVE-2026-56154
https://httpd.apache.org/security/vulnerabilities_24.html
http://www.openwall.com/lists/oss-security/2026/10/01/17
https://github.com/advisories/GHSA-f5cw-5j88-wxxc