{"id":"CVE-2026-122321","title":"Kyverno 1.18.0 before 1.19.2 verifyImages Cache Signature Verification Bypass","summary":"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 ski…","severity":"critical","cvss":9.1,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:H/A:L","cvssSource":"cna","cwe":["CWE-367"],"vendor":"kyverno","product":"kyverno","affected":["kyverno >= 1.18.0 < 1.19.2"],"published":"2026-11-05","updated":"2026-11-05","sourceUpdated":"2026-11-05T02:25:20.000Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-122321","references":[{"url":"https://github.com/kyverno/kyverno/security/advisories/GHSA-2r43-6962-xcw5","label":"GitHub Security Advisory (GHSA-2r43-6962-xcw5)"},{"url":"https://www.vulncheck.com/advisories/kyverno-1.18.0-before-1.19.2-verifyimages-cache-signature-verification-bypass","label":"VulnCheck Advisory: Kyverno 1.18.0 before 1.19.2 verifyImages Cache Signature Verification Bypass"}],"tags":["cve.org"],"ingestedAt":"2026-11-05T21:36:00.690Z","slug":"CVE-2026-122321","body":"## Overview\n\nKyverno 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.\n\n## Affected\n\n- `kyverno >= 1.18.0 < 1.19.2`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"midnight","depthScore":50,"depthScoreParts":{"impact":50.1,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}