What is the CVSS score of CVE-2026-29169?

CVE-2026-29169 has a CVSS 3.1 base score of 7.5 (High). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H. EPSS exploitation probability: 0.3%.

Which versions of Apache HTTP Server are affected by CVE-2026-29169?

CVE-2026-29169 is a high-severity denial-of-service vulnerability in Apache HTTP Server 2.4.66 and earlier that allows unauthenticated remote attackers to crash servers with the legacy mod_dav_lock…. A patch is available.

Apache HTTP Server CVE-2026-29169

Q: How to fix or mitigate CVE-2026-29169?

Within 24 hours: Inventory all Apache HTTP Server instances and identify which have mod_dav_lock enabled via configuration audit (search httpd.conf for 'LoadModule dav_lock_module'). Within 7 days: For servers with mod_dav_lock enabled, either disable the module via 'a2dismod dav_lock' (if not required) or implement network-level request filtering to block malicious DAV lock requests at the perimeter firewall/WAF. Within 30 days: Evaluate whether Subversion versions requiring mod_dav_lock remain in use; if not, permanently disable and remove the module from all affected instances. Monitor vendor advisories for patched Apache versions ≥2.4.67.

EUVD-2026-26957 HIGH

NULL Pointer Dereference (CWE-476)

2026-05-04 apache

Denial Of Service Apache Null Pointer Dereference Red Hat

7.5

CVSS 3.1

CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Lifecycle Timeline

Analysis Generated

May 04, 2026 - 17:22 vuln.today

CVSS changed

May 04, 2026 - 17:22 NVD

7.5 (None) 7.5 (HIGH)

EUVD ID Assigned

May 04, 2026 - 15:00 euvd

EUVD-2026-26957

Analysis Generated

May 04, 2026 - 15:00 vuln.today

CVE Published

May 04, 2026 - 14:48 nvd

HIGH 7.5

DescriptionNVD

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.

AnalysisAI

Remote attackers can crash Apache HTTP Server 2.4.66 and earlier by sending malicious requests that trigger a NULL pointer dereference in mod_dav_lock, causing denial of service. The vulnerability affects only servers with mod_dav_lock enabled, a legacy module whose primary use-case (Apache Subversion < 1.2.0) is obsolete in modern deployments. …

RemediationAI

Within 24 hours: Inventory all Apache HTTP Server instances and identify which have mod_dav_lock enabled via configuration audit (search httpd.conf for 'LoadModule dav_lock_module'). Within 7 days: For servers with mod_dav_lock enabled, either disable the module via 'a2dismod dav_lock' (if not required) or implement network-level request filtering to block malicious DAV lock requests at the perimeter firewall/WAF. …

Analysis

Detailed AI-generated intelligence summary covering attack vector, impact assessment, affected versions, remediation steps, and indicators of compromise.

POChttps://••••••••••.com/exploit

PATCHhttps://••••••••••.com/patch

ADVISORYhttps://••••••••••.com/advisory

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CVE-2026-29169 vulnerability details – vuln.today

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Apache HTTP Server CVE-2026-29169

CVSS VectorNVD

Lifecycle Timeline

DescriptionNVD

AnalysisAI

RemediationAI

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External POC / Exploit Code