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    CVE-2026-122321

    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.

    Published:Nov 5, 2026
    Last Modified:Nov 5, 2026
    EPS:Nov 5, 2026
    EPSS Score:
    CVSS Score:9.1

    Affected Products

    Vendor
    Kyverno
    Product
    Kyverno

    Exploits

    No exploit reference

    Related CVEs

    CVE-2026-122323 (CVSS 8.7) — Kyverno from 1.11.0 before 1.19.2 contains an unbounded decompression vulnerability in FetchSignatureBlob that…
    CVE-2026-122322 (CVSS 8.7) — Kyverno from 1.11.0 before 1.19.2 contains an unbounded decompression vulnerability in extractStatement that a…
    CVE-2026-122320 (CVSS 8.3) — Kyverno before 1.19.2 contains a missing authorization vulnerability that allows namespaced Policy authors to …
    CVE-2026-122319 (CVSS 8.7) — Kyverno before 1.19.2 contains a denial-of-service vulnerability in the In and NotIn operators that allows att…
    CVE-2026-122318 (CVSS 7.2) — Kyverno before 1.19.2 contains an authentication bypass in matchCertificateData that skips verifyImages subjec…
    CVE-2026-122316 (CVSS 8.4) — Kyverno from 1.17.0 before 1.19.2 contains a missing authorization vulnerability in the mutate-existing backgr…
    CVE-2026-122315 (CVSS 8.7) — Kyverno before 1.19.2 contains an unchecked type assertion in buildStatementMap that allows unauthenticated at…
    CVE-2026-122313 (CVSS 9.4) — Kyverno from 1.17.0 before 1.19.2 contains a privilege escalation vulnerability that allows namespace-scoped t…
    CVE-2026-122314 (CVSS 8.7) — Kyverno before 1.19.2 contains an unchecked type assertion in its variable-substitution engine that allows use…
    CVE-2026-122312 (CVSS 8.3) — Kyverno from 1.19.1 before 1.19.2 contains a namespace isolation bypass in APICall Fetch() in pkg/engine/apica…

    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