High 7.5Published May 4, 2026

CVE-2026-29169Apache HTTP Server: mod_dav_lock indirect lock crash

Updated under an hour ago (Oct 27, 2026, 11:50 AM ET)

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It affects Apache Software Foundation Apache HTTP Server and 1 other product. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for Apache Software Foundation Apache HTTP Server

Exploited in the last 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.

CVSS: 7.5 HIGH (v3.1, CISA ADP)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE): CWE-476
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: apache
NVD analysis: Modified
Record last updated: May 5, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Apache Software Foundation Apache HTTP Server apache_software_foundation:apache_http_server (from the name)	through 2.4.66	CNA record
apache http_server apache:http_server	before 2.4.67	NVD

References

References

https://httpd.apache.org/security/vulnerabilities_24.html	vendor-advisory
http://www.openwall.com/lists/oss-security/2026/05/04/20	mailing-list, third-party-advisory
http://www.openwall.com/lists/oss-security/2026/05/05/12

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.