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CVE-2026-6383

Kubevirt: kubevirt: unauthorized subresource access due to improper rbac evaluation

Published: Apr 15, 2026Updated: Apr 17, 2026 Sources: CVE List NVDCWE-863
NVD MITRE
5.4CVSSMEDIUM
EPSS Score
0.1%
Top 95.5%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Workaround Only

Description

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.

CVSS Vector Breakdown

AV:NAC:LPR:LUI:NS:UC:LI:LA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:LPrivileges Required
Low
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:LConfidentiality
Low
I:LIntegrity
Low
A:NAvailability
None
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Weaknesses

CWE-863

Affected Products

Red Hat OpenShift Virtualization 4Red Hat
SaaSSaaS Service
Cloud & SaaS / virtualization
red hatcommercialUSOperating Systemsaka red hat

Attack Graph

Products CVE Techniques Tactics

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Exploitability

Workaround Available

MITRE ATT&CK

2 techniques
Initial Access
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References

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

Timeline

Published
Apr 15, 2026
Last Updated
Apr 17, 2026

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