{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-122321","assignerOrgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","state":"PUBLISHED","assignerShortName":"VulnCheck","dateReserved":"2026-11-04T23:26:08.934Z","datePublished":"2026-11-05T02:25:20.000Z","dateUpdated":"2026-11-05T02:25:20.000Z"},"containers":{"cna":{"providerMetadata":{"orgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","shortName":"VulnCheck","dateUpdated":"2026-11-05T02:25:20.000Z"},"datePublic":"2026-10-21T00:00:00.000Z","title":"Kyverno 1.18.0 before 1.19.2 verifyImages Cache Signature Verification Bypass","descriptions":[{"lang":"en","value":"Kyverno 1.18.0 before 1.19.2 contains a signature verification bypass in verifyImages because cached verification results are keyed by the image reference string (such as a tag) rather than bound to the verified digest, so cache hits skip signature and attestation checks. An attacker who can submit workloads and move a registry tag can warm the cache with a signed image, repoint the tag, and have Kyverno admit the workload and use mutateDigest to pin the unverified digest."}],"problemTypes":[{"descriptions":[{"lang":"en","description":"Time-of-check Time-of-use (TOCTOU) Race Condition","cweId":"CWE-367","type":"CWE"}]}],"affected":[{"vendor":"kyverno","product":"kyverno","defaultStatus":"unaffected","versions":[{"version":"1.18.0","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:*:*:*:*:*:*:*:*","versionStartIncluding":"1.18.0","versionEndExcluding":"1.19.2"}]}]}],"metrics":[{"format":"CVSS","cvssV4_0":{"version":"4.0","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:H/VA:L/SC:L/SI:H/SA:L","attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"LOW","userInteraction":"NONE","vulnConfidentialityImpact":"LOW","vulnIntegrityImpact":"HIGH","vulnAvailabilityImpact":"LOW","subConfidentialityImpact":"LOW","subIntegrityImpact":"HIGH","subAvailabilityImpact":"LOW","baseScore":8.5,"baseSeverity":"HIGH"}},{"format":"CVSS","cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:H/A:L","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"CHANGED","confidentialityImpact":"LOW","integrityImpact":"HIGH","availabilityImpact":"LOW","baseScore":9.1,"baseSeverity":"CRITICAL"}}],"references":[{"url":"https://github.com/kyverno/kyverno/security/advisories/GHSA-2r43-6962-xcw5","tags":["vendor-advisory"],"name":"GitHub Security Advisory (GHSA-2r43-6962-xcw5)"},{"name":"VulnCheck Advisory: Kyverno 1.18.0 before 1.19.2 verifyImages Cache Signature Verification Bypass","tags":["third-party-advisory"],"url":"https://www.vulncheck.com/advisories/kyverno-1.18.0-before-1.19.2-verifyimages-cache-signature-verification-bypass"}],"credits":[{"lang":"en","value":"1seal","type":"finder"}],"x_generator":{"engine":"vulncheck-endgame"}}}}