CVE-2026-29169: Apache HTTP Server

High severity, CVSS 7.5. EPSS: 1.6% chance of exploitation in the next 30 days.

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.

Affected products

• Apache HTTP Server: before 2.4.67 (fixed in 2.4.67)

Published 2026-05-04. Last modified 2026-06-17.