CVE-2026-67693

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{"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"}

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