CVE-2026-22039
Kyverno Cross-Namespace Privilege Escalation via Policy apiCall
描述
Kyverno is a policy engine designed for cloud native platform engineering teams. Versions prior to 1.16.3 and 1.15.3 have a critical authorization boundary bypass in namespaced Kyverno Policy apiCall. The resolved `urlPath` is executed using the Kyverno admission controller ServiceAccount, with no enforcement that the request is limited to the policy’s namespace. As a result, any authenticated user with permission to create a namespaced Policy can cause Kyverno to perform Kubernetes API requests using Kyverno’s admission controller identity, targeting any API path allowed by that ServiceAccount’s RBAC. This breaks namespace isolation by enabling cross-namespace reads (for example, ConfigMaps and, where permitted, Secrets) and allows cluster-scoped or cross-namespace writes (for example, creating ClusterPolicies) by controlling the urlPath through context variable substitution. Versions 1.16.3 and 1.15.3 contain a patch for the vulnerability.
如何修補 CVE-2026-22039
要修補 CVE-2026-22039,請將受影響套件升級到下列已修補版本。
- —升級至 1.15.3 或更新版本
- —升級至 1.15.3 或更新版本
- —升級至 1.15.3 或更新版本
CVE-2026-22039 正在被利用嗎?
低 — EPSS 為 0.5%,目前沒有觀察到大規模利用活動。
受影響套件(3)
- from 0, < 1.15.3, >= 1.16.0, < 1.16.3
- from 0, < 1.15.3
- from 0, < 1.15.3, >= 1.16.0-rc.1, < 1.16.3
CVSS 分數
| 來源 | 版本 | 嚴重程度 | 向量 |
|---|---|---|---|
| osv | CVSS 3.1 | CRITICAL9.9 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H |