CVE-2026-122321

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    CVE-2026-122321

    Published: 5 Nov 2026Last Modified: 7 Nov 2026

    Summary: Kyverno 1.18.0 before 1.19.2 verifyImages Cache Signature Verification Bypass

    Details: 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.

    References: https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/122xxx/CVE-2026-122321.json, https://github.com/kyverno/kyverno/security/advisories/GHSA-2r43-6962-xcw5, https://nvd.nist.gov/vuln/detail/CVE-2026-122321, https://www.vulncheck.com/advisories/kyverno-1.18.0-before-1.19.2-verifyimages-cache-signature-verification-bypass

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 78e7560a5531fda5a39ffb119d7d8e47527d8aee
    Fixed -e63308f1e16c05cd009ac4864be6ec25c66b49be

    Affected versions

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High
    CVE-2026-122321 | CVE-DB