CRITICAL 9.4 NVD
CVE-2026-122303
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 Na
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.
References
- https://github.com/kyverno/kyverno/security/advisories/GHSA-jcw5-3wcg-fqx5
- https://www.vulncheck.com/advisories/kyverno-1.17.0-before-1.19.2-cross-namespace-resource
This critical severity vulnerability with a CVSS score of 9.4 was published on 2026-11-05 via NVD.
Risk Timeline
CVE Disclosed2026-11-05 · -1 days ago
Remediation Resources
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