CVE-2026-41323: Kyverno

Critical severity, CVSS 9.1. EPSS: 0.6% chance of exploitation in the next 30 days.

Kyverno is a policy engine designed for cloud native platform engineering teams. Prior to versions 1.18.0-rc1, 1.17.2-rc1, and 1.16.4, Kyverno's apiCall feature in ClusterPolicy automatically attaches the admission controller's ServiceAccount token to outgoing HTTP requests. The service URL has no validation — it can point anywhere, including attacker-controlled servers. Since the admission controller SA has permissions to patch webhook configurations, a stolen token leads to full cluster compromise. Versions 1.18.0-rc1, 1.17.2-rc1, and 1.16.4 patch the issue.

Affected products

• Kyverno Kyverno: before 1.16.4 (fixed in 1.16.4); from 1.17.0, before 1.17.2 (fixed in 1.17.2)

Published 2026-04-24. Last modified 2026-06-17.