CVE-2026-41323CRITICAL 9.1EPSS p42.1%
CVE-2026-41323CVE-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.
Scoring
| CVSS 3.1 | 9.1 (CRITICAL) |
| Vector | CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H |
| EPSS | 0.56% probability of exploitation · percentile 42.1% · 2026-06-19T12:03:05Z |
| Published | 2026-04-24 |
| Last modified | 2026-04-27 |
Underlying weaknesses· 2
References
- https://github.com/kyverno/kyverno/commit/bc4f91c4801b1eaa2edc0a14e2f1b0af8cf0c1f5
- https://github.com/kyverno/kyverno/commit/c2eab00033e635bda4e4efb58c1b472b41728bb6
- https://github.com/kyverno/kyverno/commit/f70e8ac1e7acd2e3844f9553e4a884f07f953de0
- https://github.com/kyverno/kyverno/security/advisories/GHSA-f9g8-6ppc-pqq4
- https://github.com/kyverno/kyverno/security/advisories/GHSA-f9g8-6ppc-pqq4
2
| Type | Target | Confidence | Tier |
|---|---|---|---|
| Weakness | Exposure of Sensitive Information to an Unauthorized Actorcwe-200 | 0% | live |
| Weakness | Server-Side Request Forgery (SSRF)cwe-918 | 0% | live |
Related by meaning· 6
Nearest entities by semantic similarity across the cs-graph corpus.