CVE-2026-6383: Red Hat Openshift Virtualization 4

Medium severity, CVSS 5.4. EPSS: 0.3% chance of exploitation in the next 30 days.

A flaw was found in KubeVirt's Role-Based Access Control (RBAC) evaluation logic. The authorization mechanism improperly truncates subresource names, leading to incorrect permission evaluations. This allows authenticated users with specific custom roles to gain unauthorized access to subresources, potentially disclosing sensitive information or performing actions they are not permitted to do. Additionally, legitimate users may be denied access to resources.

Affected products

• Red Hat Red Hat Openshift Virtualization 4

Published 2026-04-15. Last modified 2026-06-17.