CVE-2026-54099

Windows-machine-config-operator: windows-machine-config-operator: wicd csr extra-organization allows privilege escalation to system:masters

Published Jun 22, 2026 CVSS 3.1 · 8.8 High EPSS < 1% KEV · Not listed
Description
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.

Remediation

Vendor Workaround

At this time, no mitigation or workaround is available for this vulnerability. Customers are advised to apply the appropriate updates as they become available.

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
CPEs cpe:/a:redhat:windows_machine_config:11.0::el9
References
Type Values Removed Values Added
CPEs cpe:/a:redhat:windows_machine_config:10.20::el9
References
Type Values Removed Values Added
CPEs cpe:/a:redhat:windows_machine_config:10.19::el9
References
Type Values Removed Values Added
CPEs cpe:/a:redhat:windows_machine_config:10.21::el9
References
Type Values Removed Values Added
CPEs cpe:/a:redhat:windows_machine_config cpe:/a:redhat:windows_machine_config:10.22::el9
References
Type Values Removed Values Added
First Time appeared Redhat openshift Container Platform
Redhat openshift For Windows Containers
Vendors & Products Redhat openshift Container Platform
Redhat openshift For Windows Containers
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description 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.
Title Windows-machine-config-operator: windows-machine-config-operator: wicd csr extra-organization allows privilege escalation to system:masters
First Time appeared Redhat
Redhat openshift
Redhat windows Machine Config
Weaknesses CWE-269
CPEs cpe:/a:redhat:openshift:4
cpe:/a:redhat:windows_machine_config
Vendors & Products Redhat
Redhat openshift
Redhat windows Machine Config
References
Metrics cvssV3_1

{'score': 8.8, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
redhat
Published
Updated
Nov 4, 2026, 5:28 AM
Reserved
Jun 11, 2026, 7:02 PM
Status
Modified
Published
Jun 22, 2026, 2:17 PM
Modified
Nov 4, 2026, 6:17 AM
Severity
Important
Public date
Jun 10, 2026, 12:00 AM