CVE-2026-54099

A flaw was found in the Windows Machine Config Operator (WMCO) for Red Hat OpenShift Container Platform. The WICD CSR auto-approver validates that a Certificate Signing Request contains the organization system:wicd-nodes but does not reject additional organization values such as system:masters. A compromised Windows worker node that holds WICD credentials can submit a CSR that is auto-approved and signed by the cluster, yielding a client certificate that grants cluster-administrator privileges and enabling full cluster takeover.

CVSS v3 8.8 HIGH

8.8^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.0 / Impact : 6.0

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope CHANGED

References

Link	Resource
https://access.redhat.com/errata/RHSA-2026:47173
https://access.redhat.com/errata/RHSA-2026:61780
https://access.redhat.com/errata/RHSA-2026:81397
https://access.redhat.com/errata/RHSA-2026:82440
https://access.redhat.com/security/cve/CVE-2026-54099	Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2487950	Issue Tracking Vendor Advisory
https://access.redhat.com/errata/RHSA-2026:47173
https://access.redhat.com/errata/RHSA-2026:61780
https://access.redhat.com/security/cve/CVE-2026-54099	Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2487950	Issue Tracking Vendor Advisory
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-54099.json	Vendor Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:redhat:openshift_container_platform::::::::
	cpe:2.3:a:redhat:windows_machine_config_operator:-:::::::*

History

14 Oct 2026, 03:17

Type	Values Removed	Values Added
References		() https://access.redhat.com/errata/RHSA-2026:82440 -

12 Oct 2026, 21:17

Type	Values Removed	Values Added
References		() https://access.redhat.com/errata/RHSA-2026:81397 -

Information

Published : 2026-06-22 14:17

Updated : 2026-10-14 03:17

NVD link : CVE-2026-54099

Mitre link : CVE-2026-54099

CVE.ORG link : CVE-2026-54099

JSON object : View

Products Affected

redhat

openshift_container_platform
windows_machine_config_operator

CWE

CWE-269

Improper Privilege Management

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