{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-122318","assignerOrgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","state":"PUBLISHED","assignerShortName":"VulnCheck","dateReserved":"2026-11-04T23:25:07.316Z","datePublished":"2026-11-05T02:25:17.874Z","dateUpdated":"2026-11-05T02:25:17.874Z"},"containers":{"cna":{"providerMetadata":{"orgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","shortName":"VulnCheck","dateUpdated":"2026-11-05T02:25:17.874Z"},"datePublic":"2026-10-21T00:00:00.000Z","title":"Kyverno before 1.19.2 Cosign Identity Check Bypass via Empty SAN Certificates","descriptions":[{"lang":"en","value":"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."}],"problemTypes":[{"descriptions":[{"lang":"en","description":"Improper Certificate Validation","cweId":"CWE-295","type":"CWE"}]}],"affected":[{"vendor":"kyverno","product":"kyverno","defaultStatus":"unaffected","packageURL":"pkg:golang/github.com/kyverno/kyverno","versions":[{"version":"0","status":"affected","versionType":"semver","lessThan":"1.19.2"},{"version":"1.19.2","status":"unaffected","versionType":"semver"}]}],"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:kyverno:kyverno:*:*:*:*:*:*:*:*","versionEndExcluding":"1.19.2"}]}]}],"metrics":[{"format":"CVSS","cvssV4_0":{"version":"4.0","vectorString":"CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:L/VI:H/VA:L/SC:L/SI:H/SA:L","attackVector":"NETWORK","attackComplexity":"HIGH","attackRequirements":"PRESENT","privilegesRequired":"LOW","userInteraction":"NONE","vulnConfidentialityImpact":"LOW","vulnIntegrityImpact":"HIGH","vulnAvailabilityImpact":"LOW","subConfidentialityImpact":"LOW","subIntegrityImpact":"HIGH","subAvailabilityImpact":"LOW","baseScore":7.2,"baseSeverity":"HIGH"}},{"format":"CVSS","cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:H/A:L","attackVector":"NETWORK","attackComplexity":"HIGH","privilegesRequired":"LOW","userInteraction":"NONE","scope":"CHANGED","confidentialityImpact":"LOW","integrityImpact":"HIGH","availabilityImpact":"LOW","baseScore":7.7,"baseSeverity":"HIGH"}}],"references":[{"url":"https://github.com/kyverno/kyverno/security/advisories/GHSA-fcfr-fr8g-qjqv","tags":["vendor-advisory"],"name":"GitHub Security Advisory (GHSA-fcfr-fr8g-qjqv)"},{"name":"VulnCheck Advisory: Kyverno before 1.19.2 Cosign Identity Check Bypass via Empty SAN Certificates","tags":["third-party-advisory"],"url":"https://www.vulncheck.com/advisories/kyverno-before-1.19.2-cosign-identity-check-bypass-via-empty-san-certificates"}],"credits":[{"lang":"en","value":"arpitjain099","type":"finder"}],"x_generator":{"engine":"vulncheck-endgame"}}}}