{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-29169", "assignerOrgId": "f0158376-9dc2-43b6-827c-5f631a4d8d09", "state": "PUBLISHED", "assignerShortName": "apache", "dateReserved": "2026-03-04T11:50:32.014Z", "datePublished": "2026-05-04T14:48:29.832Z", "dateUpdated": "2026-05-05T20:23:49.062Z"}, "containers": {"cna": {"affected": [{"defaultStatus": "unaffected", "product": "Apache HTTP Server", "vendor": "Apache Software Foundation", "versions": [{"lessThanOrEqual": "2.4.66", "status": "affected", "version": "0", "versionType": "semver"}]}], "credits": [{"lang": "en", "type": "finder", "value": "Pavel Kohout, Aisle Research, Aisle.com"}], "descriptions": [{"lang": "en", "supportingMedia": [{"base64": false, "type": "text/html", "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.<br><br>The only known use-case for mod_dav_lock was mod_dav_svn from Apache Subversion earlier than version 1.2.0.<br><br>Users are recommended to upgrade to version 2.4.66, which fixes this issue, or remove mod_dav_lock.<br>"}], "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."}], "metrics": [{"other": {"content": {"text": "low"}, "type": "Textual description of severity"}}], "problemTypes": [{"descriptions": [{"cweId": "CWE-476", "description": "CWE-476 NULL Pointer Dereference", "lang": "en", "type": "CWE"}]}], "providerMetadata": {"orgId": "f0158376-9dc2-43b6-827c-5f631a4d8d09", "shortName": "apache", "dateUpdated": "2026-05-04T14:48:29.832Z"}, "references": [{"tags": ["vendor-advisory"], "url": "https://httpd.apache.org/security/vulnerabilities_24.html"}], "source": {"discovery": "EXTERNAL"}, "timeline": [{"lang": "en", "time": "2026-03-04T11:46:00.000Z", "value": "Report received"}, {"lang": "eng", "time": "2026-05-04T12:00:00.000Z", "value": "2.4.67 released"}, {"lang": "en", "time": "2026-05-04T12:00:00.000Z", "value": "fixed in 2.4.x by r1933354"}], "title": "Apache HTTP Server: mod_dav_lock indirect lock crash", "x_generator": {"engine": "Vulnogram 0.2.0"}}, "adp": [{"metrics": [{"cvssV3_1": {"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"}}, {"other": {"type": "ssvc", "content": {"timestamp": "2026-05-04T15:52:40.756863Z", "id": "CVE-2026-29169", "options": [{"Exploitation": "none"}, {"Automatable": "yes"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-05-04T15:53:03.670Z"}}, {"title": "CVE Program Container", "references": [{"url": "http://www.openwall.com/lists/oss-security/2026/05/04/20"}, {"url": "http://www.openwall.com/lists/oss-security/2026/05/05/12"}], "providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2026-05-05T20:23:49.062Z"}}]}}

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{"configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:apache:http_server:*:*:*:*:*:*:*:*", "matchCriteriaId": "8FF781BA-CF81-400B-A155-4DAE0BD856EE", "versionEndExcluding": "2.4.67", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "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."}], "id": "CVE-2026-29169", "lastModified": "2026-05-05T21:16:21.930", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}, "published": "2026-05-04T15:16:03.720", "references": [{"source": "security@apache.org", "tags": ["Vendor Advisory"], "url": "https://httpd.apache.org/security/vulnerabilities_24.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mailing List", "Third Party Advisory"], "url": "http://www.openwall.com/lists/oss-security/2026/05/04/20"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "http://www.openwall.com/lists/oss-security/2026/05/05/12"}], "sourceIdentifier": "security@apache.org", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-476"}], "source": "security@apache.org", "type": "Secondary"}]}

{"bugzilla": {"description": "httpd: mod_dav_lock: NULL pointer dereference via specially crafted request", "id": "2465296", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2465296"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.5", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-476", "details": ["A flaw was found in the mod_dav_lock module of httpd. This vulnerability allows a remote unauthenticated attacker to crash the server due to a NULL pointer dereference via a specially crafted request."], "mitigation": {"lang": "en:us", "value": "Disabling mod_dav_lock and restarting httpd will mitigate this flaw."}, "name": "CVE-2026-29169", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Affected", "package_name": "httpd", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Affected", "package_name": "httpd", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Affected", "package_name": "httpd", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "httpd:2.4/httpd", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "httpd", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/a:redhat:hummingbird:1", "fix_state": "Affected", "package_name": "httpd", "product_name": "Red Hat Hardened Images"}, {"cpe": "cpe:/a:redhat:jboss_core_services:1", "fix_state": "Affected", "package_name": "mod_dav_lock.so", "product_name": "Red Hat JBoss Core Services"}], "public_date": "2026-05-04T14:48:29Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-29169\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-29169\nhttps://httpd.apache.org/security/vulnerabilities_24.html"], "statement": "This issue allows an unauthenticated remote attacker to crash the server via a specially crafted request. However, the mod_dav_lock module is obsolete and rarely enabled in modern environments. The only known use-case for the module was mod_dav_svn from Apache Subversion earlier than version 1.2.0. Due to this reason, this vulnerability has been rated with a moderate severity.\nThis flaw only affects configurations with mod_dav_lock loaded and being used. This module can be disabled via the configuration file if its functionality is not being used.", "threat_severity": "Moderate"}

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