CVE-2026-54099: Red Hat Openshift Container Platform

High severity, CVSS 8.8. EPSS: 0.1% chance of exploitation in the next 30 days.

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

• Red Hat Openshift Container Platform: from 4.0, before 4.22.1 (fixed in 4.22.1)
• Red Hat Windows Machine Config Operator: affected versions not specified

Published 2026-06-22. Last modified 2026-09-09.