CVE-2026-6383 MEDIUM

CVE-2026-6383: Kubevirt: kubevirt: unauthorized subresource access due to improper rbac evaluation

Vendor Red Hat
Product Red Hat OpenShift Virtualization 4
Weakness CWE-863 · Incorrect authorization
Published April 15, 2026
Last update April 15, 2026

CVSS base score

5.4/10
Attack vector Network
Attack complexity Low
Privileges required Low
User interaction None
Confidentiality Low
Integrity Low

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

April 15, 2026 CVE published
April 15, 2026 Record updated