CVE-2026-29169

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 v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
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

Configurations

Configuration 1 (hide)

cpe:2.3:a:apache:http_server:*:*:*:*:*:*:*:*

History

25 Oct 2026, 23:10

Type	Values Removed	Values Added
Summary		(es) Una desreferencia de puntero NULL en mod_dav_lock en Servidor HTTP Apache 2.4.66 y anteriores puede permitir a un atacante bloquear el servidor con una solicitud maliciosa. mod_dav_lock no es utilizado internamente por mod_dav o mod_dav_fs. El único caso de uso conocido para mod_dav_lock era mod_dav_svn de Apache Subversion anterior a la versión 1.2.0. Se recomienda a los usuarios actualizar a la versión 2.4.66, que corrige este problema, o eliminar mod_dav_lock.

Information

Published : 2026-05-04 15:16

Updated : 2026-10-25 23:10

NVD link : CVE-2026-29169

Mitre link : CVE-2026-29169

CVE.ORG link : CVE-2026-29169

JSON object : View

Products Affected

apache

http_server

CWE

CWE-476

NULL Pointer Dereference

{"id": "CVE-2026-29169", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-29169", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-05-04T15:52:40.756863Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.5, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 3.9}]}, "affected": [{"source": "security@apache.org", "affectedData": [{"vendor": "Apache Software Foundation", "product": "Apache HTTP Server", "versions": [{"status": "affected", "version": "0", "versionType": "semver", "lessThanOrEqual": "2.4.66"}], "defaultStatus": "unaffected"}]}], "published": "2026-05-04T15:16:03.720", "references": [{"url": "https://httpd.apache.org/security/vulnerabilities_24.html", "tags": ["Vendor Advisory"], "source": "security@apache.org"}, {"url": "http://www.openwall.com/lists/oss-security/2026/05/04/20", "tags": ["Mailing List", "Third Party Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "http://www.openwall.com/lists/oss-security/2026/05/05/12", "source": "af854a3a-2127-422b-91ae-364da2661108"}], "vulnStatus": "Modified", "weaknesses": [{"type": "Secondary", "source": "security@apache.org", "description": [{"lang": "en", "value": "CWE-476"}]}], "descriptions": [{"lang": "en", "value": "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.\n\nThe only known use-case for mod_dav_lock was mod_dav_svn from Apache Subversion earlier than version 1.2.0.\n\nUsers are recommended to upgrade to version 2.4.66, which fixes this issue, or remove mod_dav_lock."}, {"lang": "es", "value": "Una desreferencia de puntero NULL en mod_dav_lock en Servidor HTTP Apache 2.4.66 y anteriores puede permitir a un atacante bloquear el servidor con una solicitud maliciosa. mod_dav_lock no es utilizado internamente por mod_dav o mod_dav_fs.\n\nEl \u00fanico caso de uso conocido para mod_dav_lock era mod_dav_svn de Apache Subversion anterior a la versi\u00f3n 1.2.0.\n\nSe recomienda a los usuarios actualizar a la versi\u00f3n 2.4.66, que corrige este problema, o eliminar mod_dav_lock."}], "lastModified": "2026-10-25T23:10:00.167", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:apache:http_server:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "8FF781BA-CF81-400B-A155-4DAE0BD856EE", "versionEndExcluding": "2.4.67"}], "operator": "OR"}]}], "sourceIdentifier": "security@apache.org"}