CVE-2026-29169

HIGH 7.5

Apache HTTP Server: mod_dav_lock indirect lock crash

CVSS Score

7.5

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-476
Vendor	apache software foundation
Product	apache http server
Published	May 4, 2026
Last Updated	May 4, 2026

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Affected Versions

Apache Software Foundation / Apache HTTP Server

0 ≤ 2.4.66

References

NVD ↗ CVE.org ↗ EPSS Data ↗

httpd.apache.org: https://httpd.apache.org/security/vulnerabilities_24.html openwall.com: http://www.openwall.com/lists/oss-security/2026/05/04/20

Credits

Pavel Kohout, Aisle Research, Aisle.com