CVE-2026-122304 Kyverno 1.17.0 before 1.19.2 Privilege Escalation via CleanupPolicy Context Loader
CriticalCVSS 9.4
- Published
- Updated
- Exploit status
- No public exploit known
Description
Kyverno from 1.17.0 before 1.19.2 contains an authorization bypass vulnerability that allows namespace admins to escape namespace confinement because the cleanup controller builds its context loader with a nil policy. Attackers can create a namespaced CleanupPolicy with apiCall or globalReference context entries to read cross-namespace Secrets and modify validatingwebhookconfigurations using the cleanup controller's ServiceAccount.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| kyverno | >= 1.17.0, < 1.19.2 | 1.19.2 |
References
- GitHub Security Advisory (GHSA-p58h-r4j3-h5vx) vendor-advisory
- GitHub Security Advisory (GHSA-rcxg-3f92-3mgr) vendor-advisory
- VulnCheck Advisory: Kyverno 1.17.0 before 1.19.2 Privilege Escalation via CleanupPolicy Context Loader third-party-advisory