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.
Metrics
Affected Vendors & Products
References
History
Tue, 10 Nov 2026 21:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Metrics |
ssvc
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Thu, 05 Nov 2026 02:45:00 +0000
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| 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 |
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| References |
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| Metrics |
cvssV3_1
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Status: PUBLISHED
Assigner: VulnCheck
Published: 2026-11-05T02:25:08.280Z
Updated: 2026-11-09T16:55:20.094Z
Reserved: 2026-11-04T23:23:51.289Z
Link: CVE-2026-122303
Updated: 2026-11-09T16:11:56.497Z
Status : Analyzed
Published: 2026-11-05T03:17:22.197
Modified: 2026-11-10T21:36:07.693
Link: CVE-2026-122303
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