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    CVE-2026-122311

    Kyverno from 1.16.0 before 1.19.2 fails to validate path segments in the resource argument of resource.get() and resource.post(), allowing namespaced CEL policies to escape their namespace. Tenants who can create a NamespacedValidatingPolicy can insert .. segments to read and write arbitrary cluster objects using the admission controller's ServiceAccount, leading to cluster takeover.

    Published:Nov 5, 2026
    Last Modified:Nov 5, 2026
    EPS:Nov 5, 2026
    EPSS Score:
    CVSS Score:9.9

    Affected Products

    Vendor
    Kyverno
    Product
    Kyverno

    Exploits

    No exploit reference

    Related CVEs

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    CVE-2026-122321 (CVSS 8.5) — Kyverno 1.18.0 before 1.19.2 contains a signature verification bypass in verifyImages because cached verificat…
    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…

    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