CVE-2026-54099
High
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.
SeverityHigh
CVSS8.8
Exploit probability3. percentile0.1%
Product
Redhat Openshift Container Platform
PublishedJun 22, 2026
First seenJun 22, 2026
Weakness typeCWE-269Improper privilege management
How to fix
Update
- redhat openshift_container_platform4.22.1 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| redhat openshift_container_platform | 4.0 ≤ v < 4.22.1 | 4.22.1 |
| redhat windows_machine_config_operator | No range specified | — |
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