CVE-2026-124440
kyverno
Published 8 Nov 2026 · updated 8 Nov 2026 · Received
9.4 Critical · CVSS 4.0, vulncheck.com
Description
Kyverno from 1.19.1 before 1.19.2 contains an authorization bypass vulnerability in the apiCall namespace clamp that allows namespace tenants to issue cross-namespace and cluster-scoped API requests by appending malformed percent-escapes to urlPath. Attackers can create namespaced Policies whose apiCall runs as the admission-controller ServiceAccount to read other namespaces' resources and create mutating webhooks, escalating to cluster admin.