CVE-2026-41323
Last modified
CVE-2026-41323 is a critical-severity vulnerability rated 9.1/10 on the CVSS scale. 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. EPSS estimates a 0.56% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Kyverno | Kyverno | < 1.16.4 |
| Kyverno | Kyverno | >= 1.17.0, < 1.17.2 |
References
- https://github.com/kyverno/kyverno/security/advisories/GHSA-f9g8-6ppc-pqq4Exploit, Vendor Advisory
- https://github.com/kyverno/kyverno/security/advisories/GHSA-f9g8-6ppc-pqq4Exploit, Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Analyzed
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