What is CVE-2026-6383?

CVE-2026-6383 is a medium-severity vulnerability in Red Hat Openshift Virtualization 4, classified under Incorrect Authorization. CVSS score: 5.4/10. Published 2026-04-15.

How severe is CVE-2026-6383?

Medium severity. CVSS v3 base score is 5.4 out of 10.

Auth bypass in Red Hat Openshift Virtualization 4

CVE-2026-6383

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 specifi…

Vulnerability class: Broken Access Control

EPSS: 0.000 (11.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N.

Affected products

Red Hat Openshift Virtualization 4

Weakness classification (CWE)

CWE-863 — Incorrect Authorization

References

access.redhat.com/security/cve/CVE-2026-6383 (vdb-entry, x_refsource_REDHAT)
RHBZ#2458741 (issue-tracking, x_refsource_REDHAT)

Frequently asked questions

What is CVE-2026-6383?: CVE-2026-6383 is a medium-severity vulnerability in Red Hat Openshift Virtualization 4, classified under Incorrect Authorization. CVSS score: 5.4/10. Published 2026-04-15.
How severe is CVE-2026-6383?: Medium severity. CVSS v3 base score is 5.4 out of 10.