CVE-2026-41068

Kyverno: Cross-Namespace Read Bypasses RBAC Isolation (CVE-2026-22039 Incomplete Fix)

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

kyverno

CVSS v3.1 GITHUB

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

EPSS

0.37% chance of exploitation in the next 30 days, 29th percentile

Published

2026-04-24

Proof-of-concept exploits (1)

• advisories/GHSA-cvq5-hhx3-f99p

Security advisories

• kyverno/kyverno/security/advisories/GHSA-cvq5-hhx3-f99p
• kyverno/kyverno/commit/bbf3e5c01391d612968440659028ae98e565a777

References

• CVE Record
• NVD entry