Severity: low Affected versions:
- Apache HTTP Server through 2.4.66 Description: A NULL pointer dereference in mod_dav_lock in Apache HTTP Server 2.4.66 and earlier may allow an attacker to crash the server with a malicious request.mod_dav_lock is not used internally by mod_dav or mod_dav_fs. The only known use-case for mod_dav_lock was mod_dav_svn from Apache Subversion earlier than version 1.2.0. Users are recommended to upgrade to version 2.4.66, which fixes this issue, or remove mod_dav_lock. Credit: Pavel Kohout, Aisle Research, Aisle.com (finder) References: https://httpd.apache.org/security/vulnerabilities_24.html https://httpd.apache.org/ https://www.cve.org/CVERecord?id=CVE-2026-29169 Timeline: 2026-03-04: Report received 2026-05-04: 2.4.67 released 2026-05-04: fixed in 2.4.x by r1933354
