Description
Kyverno is a policy engine designed for cloud native platform engineering teams. The patch for CVE-2026-22039 fixed cross-namespace privilege escalation in Kyverno's `apiCall` context by validating the `URLPath` field. However, the ConfigMap context loader has the identical vulnerability — the `configMap.namespace` field accepts any namespace with zero validation, allowing a namespace admin to read ConfigMaps from any namespace using Kyverno's privileged service account. This is a complete RBAC bypass in multi-tenant Kubernetes clusters. An updated fix is available in version 1.17.2.
Affected products
kyverno: kyverno
References3
- github.com/kyverno/kyverno/security/advisories/GHSA-cvq5-hhx3-f… ExploitVendor Advisory
- github.com/kyverno/kyverno/security/advisories/GHSA-cvq5-hhx3-f… ExploitVendor Advisory
- github.com/kyverno/kyverno/commit/bbf3e5c01391d612968440659028a… Patch
Metrics
- CVSS 3.1
-
7.7
HIGH
Score source: CNA
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N - EPSS — exploit probability
- 0% percentile: 19 · as of 13 November 2026
- CWE
- CWE-863
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.