Severity: low Affected versions:
- Apache HTTP Server 2.4.0 through 2.4.68 Description: Use after free in mod_auth_digest in Apache Software Foundation Apache HTTP Server before 2.4.69 on all platforms allows an unauthenticated remote client to cause authentication state corruption via concurrent Digest authentication requests when AuthDigestNcCheck is enabled or AuthDigestNonceLifetime is set to 0. Users are recommended to upgrade to version 2.4.69, which fixes this issue. Credit: Zhen Kong (finder) Darren Carreras (DarrenC) (finder) References: https://httpd.apache.org/security/vulnerabilities_24.html https://httpd.apache.org/ https://www.cve.org/CVERecord?id=CVE-2026-73637 Timeline: 2026-07-18: Report received 2026-10-01: fixed in 2.4.x by r1937721 2026-10-01: 2.4.69 released
