{"dataType": "CVE_RECORD", "cveMetadata": {"state": "PUBLISHED", "cveId": "CVE-2026-67693", "assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "assignerShortName": "mitre", "dateUpdated": "2026-10-08T18:51:16.356Z", "dateReserved": "2026-07-30T00:00:00.000Z", "datePublished": "2026-10-08T00:00:00.000Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "shortName": "mitre", "dateUpdated": "2026-10-08T18:51:16.356Z"}, "descriptions": [{"lang": "en", "value": "An issue in gnutls v.3.8.13 allows an attacker to obtain sensitive information via failing to reject end-entity X.509 certificates that contain a contradictory combination of Key Usage (KU) and Extended Key Usage (EKU)"}], "affected": [{"vendor": "n/a", "product": "n/a", "versions": [{"version": "n/a", "status": "affected"}]}], "references": [{"url": "http://gnutls.com"}, {"url": "https://gitlab.com/gnutls/gnutls/-/blob/3.8.13/lib/x509/verify.c#L1119-1178"}, {"url": "https://gist.github.com/lkloliver/6fbfc191bc6163942c8017551ac3f238"}], "problemTypes": [{"descriptions": [{"type": "text", "lang": "en", "description": "n/a"}]}]}}, "dataVersion": "5.2"}

{}

{"affected": [{"affectedData": [{"product": "n/a", "vendor": "n/a", "versions": [{"status": "affected", "version": "n/a"}]}], "source": "cve@mitre.org"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "An issue in gnutls v.3.8.13 allows an attacker to obtain sensitive information via failing to reject end-entity X.509 certificates that contain a contradictory combination of Key Usage (KU) and Extended Key Usage (EKU)"}], "id": "CVE-2026-67693", "lastModified": "2026-10-08T21:33:42.423", "metrics": {}, "published": "2026-10-08T19:18:41.280", "references": [{"source": "cve@mitre.org", "url": "http://gnutls.com"}, {"source": "cve@mitre.org", "url": "https://gist.github.com/lkloliver/6fbfc191bc6163942c8017551ac3f238"}, {"source": "cve@mitre.org", "url": "https://gitlab.com/gnutls/gnutls/-/blob/3.8.13/lib/x509/verify.c#L1119-1178"}], "sourceIdentifier": "cve@mitre.org", "vulnStatus": "Awaiting Analysis"}

{"bugzilla": {"description": "gnutls: gnutls: Information disclosure via contradictory Key Usage and Extended Key Usage extensions", "id": "2548190", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2548190"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.9", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N", "status": "draft"}, "cwe": "CWE-295", "details": ["A flaw was found in GnuTLS. The certificate verification process fails to properly reject end-entity digital certificates containing contradictory Key Usage (KU) and Extended Key Usage (EKU) extensions, which define the permitted cryptographic operations of a certificate. A remote attacker could exploit this flaw by presenting a specially crafted certificate to bypass validation controls, potentially resulting in information disclosure."], "name": "CVE-2026-67693", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Affected", "package_name": "gnutls", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "gnutls", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Fix deferred", "package_name": "gnutls", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "gnutls", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "gnutls", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/a:redhat:hummingbird:1", "fix_state": "Affected", "package_name": "gnutls", "product_name": "Red Hat Hardened Images"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Fix deferred", "package_name": "openshift/ose-rhel-coreos-8", "product_name": "Red Hat OpenShift Container Platform 4"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Fix deferred", "package_name": "openshift/ose-rhel-coreos-9", "product_name": "Red Hat OpenShift Container Platform 4"}], "public_date": "2026-10-08T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-67693\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-67693\nhttp://gnutls.com\nhttps://gist.github.com/lkloliver/6fbfc191bc6163942c8017551ac3f238\nhttps://gitlab.com/gnutls/gnutls/-/blob/3.8.13/lib/x509/verify.c#L1119-1178"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "3.8.13"}}], "enrichment": {"confidence": 80.0, "confidence_source": "inferred", "scores": [{"score": 80.0, "source": "inferred"}, {"score": 87.0, "source": "matching"}]}, "original": {"product": "n/a", "source": "cna", "vendor": "n/a"}, "product": "gnutls", "vendor": "gnu"}], "created": "2026-10-08T21:00:14.223576+00:00", "updated": "2026-10-09T07:30:17.916074+00:00", "vendors": ["gnu", "gnu$PRODUCT$gnutls"]}