NULL pointer dereference in Apache HTTP Server - CVE-2026-29169
Published: May 4, 2026
Vulnerability identifier: #VU129546
CSH Severity: Medium
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2026-29169
CWE-ID: CWE-476
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
Apache HTTP Server
Apache HTTP Server
Software vendor:
Apache Foundation
Apache Foundation
Description
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to a NULL pointer dereference in mod_dav_lock when handling requests. A remote attacker can send a malicious request to cause a denial of service.
mod_dav_lock is not used internally by mod_dav or mod_dav_fs, and the only known use-case mentioned is mod_dav_svn earlier than version 1.2.0.
Remediation
Install security update from vendor's website.