CVE-2026-22039— Kyverno Cross-Namespace Privilege Escalation via Policy apiCall

Kyverno Cross-Namespace Privilege Escalation via Policy apiCall

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.

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

特权管理不恰当

Kyverno 代码问题漏洞

Kyverno是Kyverno开源的一个为 Kubernetes 设计的策略引擎。 Kyverno 1.16.3之前版本和1.15.3之前版本存在代码问题漏洞，该漏洞源于命名空间Kyverno Policy apiCall中存在授权边界绕过，可能导致跨命名空间读取或写入，破坏命名空间隔离。

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