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CVE-2026-122321Kyverno 1.18.0 before 1.19.2 verifyImages Cache Signature Verification Bypass
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.
8.5 HIGHEPSS 0.22%Not in KEVNVD: Undergoing Analysis
Overview
Severity
| Score | Severity | Version | Vector String |
|---|---|---|---|
| 8.5 | HIGH | 4.0VulnCheck (CNA) | 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 |
| 9.1 | CRITICAL | 3.1VulnCheck (CNA) | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:H/A:L |
Details
- CVE ID
- CVE-2026-122321
- Status
- Undergoing Analysis
- Assigner (CNA)
- VulnCheck
- Published
- Nov 5, 2026
- Last modified
- 2026-11-05 14:58 UTC
- Weaknesses
- CWE-367 · Time-of-check Time-of-use (TOCTOU) Race Condition
Affected Products
As published by the CNA in the CVE record.
kyvernokyverno1 version range
- 1.18.0 before 1.19.2