Use after free in mod_auth_digest in Apache Software Foundation Apache HTTP Server before 2.4.69 on all platforms allows an unauthenticated remote client to cause authentication state corruption via concurrent Digest authentication requests when AuthDigestNcCheck is enabled or AuthDigestNonceLifetime is set to 0. Users are recommended to upgrade to version 2.4.69, which fixes this issue.

zetlyn/cve-nvd vulnerability cve CVE-2026-73637 known 2026-10-01

https://nvd.nist.gov/vuln/detail/CVE-2026-73637

Properties

cvss	7.3 receipt Source NVD Its words `7.3` Read by `field:cve.metrics.cvssMetricV31[].cvssData.baseScore` Said since 2026-10-02 12:00 UTC Last answered 2026-10-05 12:24 UTC Original open at the source What the source handed over { "cve": { "affected": [ { "affectedData": [ { "defaultStatus": "unaffected", "product": "Apache HTTP Server", "vendor": "Apache Software Foundation", "versions": [ { "lessThanOrEqual": "2.4.68", "status": "affected", "version": "2.4.0", "versionType": "semver" } ] } ], "source": "security@apache.org" } ], "cveTags": [], "descriptions": [ { "lang": "en", "value": "Use after free in mod_auth_digest in Apache Software Foundation Apache HTTP Server before 2.4.69 on all platforms allows an unauthenticated remote client to cause authentication state corruption via concurrent Digest authentication requests when AuthDigestNcCheck is enabled or AuthDigestNonceLifetime is set to 0.\n\nUsers are recommended to upgrade to version 2.4.69, which fixes this issue." } ], "id": "CVE-2026-73637", "lastModified": "2026-10-01T21:17:24.467", "metrics": { "cvssMetricV31": [ { "cvssData": { "attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "LOW", "baseScore": 7.3, "baseSeverity": "HIGH", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L", "version": "3.1" }, "exploitabilityScore": 3.9, "impactScore": 3.4, "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary" } ], "ssvcV203": [ { "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": { "id": "CVE-2026-73637", "options": [ { "exploitation": "none" }, { "automatable": "yes" }, { "technicalImpact": "partial" } ], "role": "CISA Coordinator", "timestamp": "2026-10-01T19:42:16.346387Z", "version": "2.0.3" } } ] }, "published": "2026-10-01T17:17:31.000", "references": [ { "source": "security@apache.org", "url": "https://httpd.apache.org/security/vulnerabilities_24.html" }, { "source": "af854a3a-2127-422b-91ae-364da2661108", "url": "http://www.openwall.com/lists/oss-security/2026/10/01/28" } ], "sourceIdentifier": "security@apache.org", "vulnStatus": "Awaiting Analysis", "weaknesses": [ { "description": [ { "lang": "en", "value": "CWE-416" } ], "source": "security@apache.org", "type": "Secondary" } ] } }
product	Apache HTTP Server receipt Source NVD Its words `Apache HTTP Server` Read by `field:cve.affected[].affectedData[].product` Said since 2026-10-02 12:00 UTC Last answered 2026-10-05 12:24 UTC Original open at the source What the source handed over { "cve": { "affected": [ { "affectedData": [ { "defaultStatus": "unaffected", "product": "Apache HTTP Server", "vendor": "Apache Software Foundation", "versions": [ { "lessThanOrEqual": "2.4.68", "status": "affected", "version": "2.4.0", "versionType": "semver" } ] } ], "source": "security@apache.org" } ], "cveTags": [], "descriptions": [ { "lang": "en", "value": "Use after free in mod_auth_digest in Apache Software Foundation Apache HTTP Server before 2.4.69 on all platforms allows an unauthenticated remote client to cause authentication state corruption via concurrent Digest authentication requests when AuthDigestNcCheck is enabled or AuthDigestNonceLifetime is set to 0.\n\nUsers are recommended to upgrade to version 2.4.69, which fixes this issue." } ], "id": "CVE-2026-73637", "lastModified": "2026-10-01T21:17:24.467", "metrics": { "cvssMetricV31": [ { "cvssData": { "attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "LOW", "baseScore": 7.3, "baseSeverity": "HIGH", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L", "version": "3.1" }, "exploitabilityScore": 3.9, "impactScore": 3.4, "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary" } ], "ssvcV203": [ { "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": { "id": "CVE-2026-73637", "options": [ { "exploitation": "none" }, { "automatable": "yes" }, { "technicalImpact": "partial" } ], "role": "CISA Coordinator", "timestamp": "2026-10-01T19:42:16.346387Z", "version": "2.0.3" } } ] }, "published": "2026-10-01T17:17:31.000", "references": [ { "source": "security@apache.org", "url": "https://httpd.apache.org/security/vulnerabilities_24.html" }, { "source": "af854a3a-2127-422b-91ae-364da2661108", "url": "http://www.openwall.com/lists/oss-security/2026/10/01/28" } ], "sourceIdentifier": "security@apache.org", "vulnStatus": "Awaiting Analysis", "weaknesses": [ { "description": [ { "lang": "en", "value": "CWE-416" } ], "source": "security@apache.org", "type": "Secondary" } ] } }
status	Awaiting Analysis receipt Source NVD Its words `Awaiting Analysis` Read by `field:cve.vulnStatus` Said since 2026-10-02 12:00 UTC Last answered 2026-10-05 12:24 UTC Original open at the source What the source handed over { "cve": { "affected": [ { "affectedData": [ { "defaultStatus": "unaffected", "product": "Apache HTTP Server", "vendor": "Apache Software Foundation", "versions": [ { "lessThanOrEqual": "2.4.68", "status": "affected", "version": "2.4.0", "versionType": "semver" } ] } ], "source": "security@apache.org" } ], "cveTags": [], "descriptions": [ { "lang": "en", "value": "Use after free in mod_auth_digest in Apache Software Foundation Apache HTTP Server before 2.4.69 on all platforms allows an unauthenticated remote client to cause authentication state corruption via concurrent Digest authentication requests when AuthDigestNcCheck is enabled or AuthDigestNonceLifetime is set to 0.\n\nUsers are recommended to upgrade to version 2.4.69, which fixes this issue." } ], "id": "CVE-2026-73637", "lastModified": "2026-10-01T21:17:24.467", "metrics": { "cvssMetricV31": [ { "cvssData": { "attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "LOW", "baseScore": 7.3, "baseSeverity": "HIGH", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L", "version": "3.1" }, "exploitabilityScore": 3.9, "impactScore": 3.4, "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary" } ], "ssvcV203": [ { "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": { "id": "CVE-2026-73637", "options": [ { "exploitation": "none" }, { "automatable": "yes" }, { "technicalImpact": "partial" } ], "role": "CISA Coordinator", "timestamp": "2026-10-01T19:42:16.346387Z", "version": "2.0.3" } } ] }, "published": "2026-10-01T17:17:31.000", "references": [ { "source": "security@apache.org", "url": "https://httpd.apache.org/security/vulnerabilities_24.html" }, { "source": "af854a3a-2127-422b-91ae-364da2661108", "url": "http://www.openwall.com/lists/oss-security/2026/10/01/28" } ], "sourceIdentifier": "security@apache.org", "vulnStatus": "Awaiting Analysis", "weaknesses": [ { "description": [ { "lang": "en", "value": "CWE-416" } ], "source": "security@apache.org", "type": "Secondary" } ] } }
vendor	Apache Software Foundation receipt Source NVD Its words `Apache Software Foundation` Read by `field:cve.affected[].affectedData[].vendor` Said since 2026-10-02 12:00 UTC Last answered 2026-10-05 12:24 UTC Original open at the source What the source handed over { "cve": { "affected": [ { "affectedData": [ { "defaultStatus": "unaffected", "product": "Apache HTTP Server", "vendor": "Apache Software Foundation", "versions": [ { "lessThanOrEqual": "2.4.68", "status": "affected", "version": "2.4.0", "versionType": "semver" } ] } ], "source": "security@apache.org" } ], "cveTags": [], "descriptions": [ { "lang": "en", "value": "Use after free in mod_auth_digest in Apache Software Foundation Apache HTTP Server before 2.4.69 on all platforms allows an unauthenticated remote client to cause authentication state corruption via concurrent Digest authentication requests when AuthDigestNcCheck is enabled or AuthDigestNonceLifetime is set to 0.\n\nUsers are recommended to upgrade to version 2.4.69, which fixes this issue." } ], "id": "CVE-2026-73637", "lastModified": "2026-10-01T21:17:24.467", "metrics": { "cvssMetricV31": [ { "cvssData": { "attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "LOW", "baseScore": 7.3, "baseSeverity": "HIGH", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L", "version": "3.1" }, "exploitabilityScore": 3.9, "impactScore": 3.4, "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary" } ], "ssvcV203": [ { "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": { "id": "CVE-2026-73637", "options": [ { "exploitation": "none" }, { "automatable": "yes" }, { "technicalImpact": "partial" } ], "role": "CISA Coordinator", "timestamp": "2026-10-01T19:42:16.346387Z", "version": "2.0.3" } } ] }, "published": "2026-10-01T17:17:31.000", "references": [ { "source": "security@apache.org", "url": "https://httpd.apache.org/security/vulnerabilities_24.html" }, { "source": "af854a3a-2127-422b-91ae-364da2661108", "url": "http://www.openwall.com/lists/oss-security/2026/10/01/28" } ], "sourceIdentifier": "security@apache.org", "vulnStatus": "Awaiting Analysis", "weaknesses": [ { "description": [ { "lang": "en", "value": "CWE-416" } ], "source": "security@apache.org", "type": "Secondary" } ] } }

Text

Use after free in mod_auth_digest in Apache Software Foundation Apache HTTP Server before 2.4.69 on all platforms allows an unauthenticated remote client to cause authentication state corruption via concurrent Digest authentication requests when AuthDigestNcCheck is enabled or AuthDigestNonceLifetime is set to 0. Users are recommended to upgrade to version 2.4.69, which fixes this issue.