---
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'
---

## Overview

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.

## Affected

- `kyverno >= 1.18.0 < 1.19.2`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.