Access Control Flaw in KubeVirt Causes Unauthorized Resource Access
CVE-2026-6383

5.4MEDIUM

Key Information:

Vendor

Red Hat
Status
Red Hat Openshift Virtualization 4
Vendor
CVE Published:
15 April 2026

What is CVE-2026-6383?

A critical flaw has been identified in KubeVirt's Role-Based Access Control (RBAC) evaluation logic. The authorization mechanism improperly truncates subresource names, leading to incorrect evaluations of permissions. This vulnerability allows authenticated users with specific custom roles to gain unauthorized access to subresources, potentially exposing sensitive information or enabling actions outside their permitted scope. Additionally, legitimate users may face denials when trying to access resources they should normally have permission to view or manage, raising concerns about security integrity and user trust.

References

https://access.redhat.com/security/cve/CVE-2026-6383
vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2458741
issue-trackingx_refsource_REDHAT

CVSS V3.1

Score:
5.4
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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