CVE-2026-29169CWE-476

Apache HTTP Server: mod_dav_lock indirect lock crash

High · published May 4, 2026

CVSS v3.1
7.5
EPSS
2%
Percentile
75.2
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
7.5 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS v4.0
Not supplied
EPSS
0.01574 · 75.2th percentile
Weakness
CWE-476 · NULL Pointer Dereference
Published
2026-05-04T14:48Z
EPSS history
Timeline
  • 04 MAY 14:48Z
    Apache HTTP Server: mod_dav_lock indirect lock crash
    cvelistv5