{"id":"CVE-2026-122318","published":"2026-11-05T03:17:24.523","lastModified":"2026-11-05T03:17:24.523","description":"Kyverno before 1.19.2 contains an authentication bypass in matchCertificateData that skips verifyImages subject and subjectRegExp checks when the signing certificate has no Subject Alternative Name. Attackers holding a leaf certificate from a configured private trust root can omit the SAN, set the expected Fulcio issuer OID, and sign malicious images that are admitted despite signer pinning.","cvssScore":7.7,"cvssSeverity":"HIGH","cvssVector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:H/A:L","cwes":["CWE-295"],"vendors":[],"products":[],"references":[{"url":"https://github.com/kyverno/kyverno/security/advisories/GHSA-fcfr-fr8g-qjqv","tags":[]},{"url":"https://www.vulncheck.com/advisories/kyverno-before-1.19.2-cosign-identity-check-bypass-via-empty-san-certificates","tags":[]}],"exploitRefs":[{"url":"https://github.com/kyverno/kyverno/security/advisories/GHSA-fcfr-fr8g-qjqv","tags":[]}],"hasPoc":true,"ai":null}