CVE-2026-41323
Description
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.
How to fix
- kyverno kyverno1.16.4, 1.17.2 or later
- github.com/kyverno/kyverno1.17.0 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| kyverno kyverno | v < 1.16.4, 1.17.0 ≤ v < 1.17.2 | 1.16.4, 1.17.2 |
| github.com/kyverno/kyvernoGo | v < 1.17.0 | 1.17.0 |
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