CVE-2026-29169NVD

Vulnerability Summary

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.

Severity Level

HIGH(7.5)

Published Date

May 4, 2026

Last Modified

May 5, 2026

Exploitation Status

No confirmed exploitation yet

EPSS Score (30-Day)

0.58%Probability

Root Weakness (CWE)

CWE-476: Unknown/Unlisted Weakness ↗

Refer to the official MITRE database for detailed architectural specifications regarding this weakness.

CVSS v3.1 Base Metrics — Score 7.5 (HIGH)

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

ConfidentialityNone

IntegrityNone

AvailabilityHigh

Affected & Patched Versions

Affected Versions

Apache Http Server < 2.4.67

Patched Versions

Apache Http Server 2.4.67

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