{"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"}}}}

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