Vulnerability 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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Kyverno | Kyverno | < 1.16.4 |
Related Weaknesses (CWE)
References
- https://github.com/kyverno/kyverno/commit/bc4f91c4801b1eaa2edc0a14e2f1b0af8cf0c1Patch
- https://github.com/kyverno/kyverno/commit/c2eab00033e635bda4e4efb58c1b472b41728bPatch
- https://github.com/kyverno/kyverno/commit/f70e8ac1e7acd2e3844f9553e4a884f07f953dPatch
- https://github.com/kyverno/kyverno/security/advisories/GHSA-f9g8-6ppc-pqq4Vendor AdvisoryExploit
- https://github.com/kyverno/kyverno/security/advisories/GHSA-f9g8-6ppc-pqq4Vendor AdvisoryExploit
FAQ
What is CVE-2026-41323?
CVE-2026-41323 is a vulnerability with a CVSS score of 8.1 (HIGH). 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...
How severe is CVE-2026-41323?
CVE-2026-41323 has been rated HIGH with a CVSS base score of 8.1/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-41323?
Check the references section above for vendor advisories and patch information. Affected products include: Kyverno Kyverno.