high8.8
CVE-2026-54099
A flaw was found in the Windows Machine Config Operator (WMCO) for Red Hat OpenShift Container Platform.
Impact
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.
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Redhat | Openshift Container Platform | from 4.0 before 4.22.1 |
| Redhat | Windows Machine Config Operator | All versions |
Weakness classification
References
- NVD record
- CVE.org record
- 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
- https://bugzilla.redhat.com/show_bug.cgi?id=2487950
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-54099.json