CVE-2026-122321 Kyverno 1.18.0 before 1.19.2 verifyImages Cache Signature Verification Bypass

What is CVE-2026-122321?

CVE-2026-122321 is a high-severity vulnerability in kyverno, published on 5 Nov 2026.

Official description

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.

Weakness: CWE-367

Which versions are affected by CVE-2026-122321?

It affects 1 product.

Products include Kyverno.

How do I fix CVE-2026-122321?

No fix has been published for CVE-2026-122321 yet. Limit exposure of the affected software until one is available.

Is CVE-2026-122321 being exploited?

There is no known exploitation of CVE-2026-122321 in the wild and no public exploit code.

Other vulnerabilities in kyverno

• CVE-2026-22039 Kyverno Cross-Namespace Privilege Escalation via Policy apiCall Critical 10.0
• CVE-2026-4789 CVE-2026-4789 Critical 9.8
• CVE-2026-122303 Kyverno 1.17.0 before 1.19.2 Cross-Namespace Resource Overwrite via NamespacedMutatingPolicy Critical 9.4
• CVE-2026-122304 Kyverno 1.17.0 before 1.19.2 Privilege Escalation via CleanupPolicy Context Loader Critical 9.4
• CVE-2026-122310 Kyverno 1.19.1 before 1.19.2 Privilege Escalation via Policy apiCall urlPath Critical 9.4

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• GitHub advisory
• How this page is made

Also known as GHSA-2r43-6962-xcw5, GHSA-2vqq-m4qm-q6m7.