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.

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Fixes

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History

Mon, 04 May 2026 18:30:00 +0000

Type Values Removed Values Added
References

Mon, 04 May 2026 17:15:00 +0000

Type Values Removed Values Added
First Time appeared Apache Software Foundation
Apache Software Foundation apache Http Server
Vendors & Products Apache Software Foundation
Apache Software Foundation apache Http Server

Mon, 04 May 2026 16:15:00 +0000

Type Values Removed Values Added
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}

ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Mon, 04 May 2026 15:00:00 +0000

Type Values Removed Values Added
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.
Title Apache HTTP Server: mod_dav_lock indirect lock crash
Weaknesses CWE-476
References

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cve-icon MITRE

Status: PUBLISHED

Assigner: apache

Published:

Updated: 2026-05-04T17:32:38.100Z

Reserved: 2026-03-04T11:50:32.014Z

Link: CVE-2026-29169

cve-icon Vulnrichment

Updated: 2026-05-04T17:32:38.100Z

cve-icon NVD

Status : Undergoing Analysis

Published: 2026-05-04T15:16:03.720

Modified: 2026-05-04T18:16:26.680

Link: CVE-2026-29169

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-05-04T17:30:04Z

Weaknesses