Kyverno from 1.17.0 before 1.19.2 contains an authorization bypass vulnerability that allows namespace tenants to overwrite resources in other namespaces via NamespacedMutatingPolicy mutate-existing targetMatchConstraints.expression. Attackers can return a CEL map literal fabricating a target with an attacker-chosen metadata.namespace, causing the privileged background controller to overwrite Secrets, Deployments, or policies cluster-wide.
Advisories
No advisories yet.
Fixes
Solution
No solution given by the vendor.
Workaround
No workaround given by the vendor.
References
History
Thu, 05 Nov 2026 02:45:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | Kyverno from 1.17.0 before 1.19.2 contains an authorization bypass vulnerability that allows namespace tenants to overwrite resources in other namespaces via NamespacedMutatingPolicy mutate-existing targetMatchConstraints.expression. Attackers can return a CEL map literal fabricating a target with an attacker-chosen metadata.namespace, causing the privileged background controller to overwrite Secrets, Deployments, or policies cluster-wide. | |
| Title | Kyverno 1.17.0 before 1.19.2 Cross-Namespace Resource Overwrite via NamespacedMutatingPolicy | |
| First Time appeared |
Kyverno
Kyverno kyverno |
|
| Weaknesses | CWE-862 | |
| CPEs | cpe:2.3:a:kyverno:kyverno:*:*:*:*:*:*:*:* | |
| Vendors & Products |
Kyverno
Kyverno kyverno |
|
| References |
| |
| Metrics |
cvssV3_1
|
Projects
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Status: PUBLISHED
Assigner: VulnCheck
Published:
Updated: 2026-11-05T02:25:08.280Z
Reserved: 2026-11-04T23:23:51.289Z
Link: CVE-2026-122303
No data.
Status : Received
Published: 2026-11-05T03:17:22.197
Modified: 2026-11-05T03:17:22.197
Link: CVE-2026-122303
No data.
OpenCVE Enrichment
Updated: 2026-11-05T04:00:14Z
Weaknesses