critical · CVSS v3 9.9 · CVSS v4 9.4

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 resourc…

Description

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.

Scores

Severity
critical
CVSS v2
9
CVSS v3
9.9
CVSS v4
9.4
EPSS
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