Kyverno from 1.16.0 before 1.19.2 fails to validate path segments in the resource argument of resource.get() and resource.post(), allowing namespaced CEL policies to escape their namespace. Tenants who can create a NamespacedValidatingPolicy can insert .. segments to read and write arbitrary cluster objects using the admission controller's ServiceAccount, leading to cluster takeover.
Metrics
Affected Vendors & Products
References
History
Tue, 10 Nov 2026 21:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Metrics |
ssvc
|
Thu, 05 Nov 2026 02:45:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | Kyverno from 1.16.0 before 1.19.2 fails to validate path segments in the resource argument of resource.get() and resource.post(), allowing namespaced CEL policies to escape their namespace. Tenants who can create a NamespacedValidatingPolicy can insert .. segments to read and write arbitrary cluster objects using the admission controller's ServiceAccount, leading to cluster takeover. | |
| Title | Kyverno 1.16.0 before 1.19.2 Path Traversal in Namespaced CEL Policies via resource argument | |
| First Time appeared |
Kyverno
Kyverno kyverno |
|
| Weaknesses | CWE-22 | |
| CPEs | cpe:2.3:a:kyverno:kyverno:*:*:*:*:*:*:*:* | |
| Vendors & Products |
Kyverno
Kyverno kyverno |
|
| References |
| |
| Metrics |
cvssV3_1
|
Status: PUBLISHED
Assigner: VulnCheck
Published: 2026-11-05T02:25:13.645Z
Updated: 2026-11-09T16:53:57.441Z
Reserved: 2026-11-04T23:25:07.315Z
Link: CVE-2026-122311
Updated: 2026-11-09T16:12:05.889Z
Status : Analyzed
Published: 2026-11-05T03:17:23.497
Modified: 2026-11-10T20:36:01.980
Link: CVE-2026-122311
No data.