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.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
< 1.16.4CPE matchmatch criteria | cpe:2.3:a:kyverno:kyverno:*:-:*:*:*:*:*:* | ||
>= 1.17.0, < 1.17.2CPE matchmatch criteria | cpe:2.3:a:kyverno:kyverno:*:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
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