Vulnerability 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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Redhat | Openshift Container Platform | >= 4.0, < 4.22.1 |
| Redhat | Windows Machine Config Operator | - |
Related Weaknesses (CWE)
References
- https://access.redhat.com/errata/RHSA-2026:47173
- https://access.redhat.com/security/cve/CVE-2026-54099Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2487950Issue TrackingVendor Advisory
- https://access.redhat.com/errata/RHSA-2026:47173
- https://access.redhat.com/security/cve/CVE-2026-54099Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2487950Issue TrackingVendor Advisory
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-54099.jsonVendor Advisory
FAQ
What is CVE-2026-54099?
CVE-2026-54099 is a vulnerability with a CVSS score of 8.8 (HIGH). 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 organizati...
How severe is CVE-2026-54099?
CVE-2026-54099 has been rated HIGH with a CVSS base score of 8.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-54099?
Check the references section above for vendor advisories and patch information. Affected products include: Redhat Openshift Container Platform, Redhat Windows Machine Config Operator.