CVE-2026-54099

[CVE catalog]

Severity

High · CVSS 8.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Published

Jun 10, 2026, 12:00:00 AM UTC

Source

[NVD] · [CVE record]

EPSS

0.12% · Oct 25, 2026

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. windows-machine-config-operator: windows-machine-config-operator: WICD CSR extra-Organization allows privilege escalation to system:masters This flaw affects OpenShift clusters running the Windows Machine Config Operator (WMCO) with one or more Windows worker nodes. Clusters without Windows nodes or without WMCO are not affected. Exploitation requires compromising a Windows worker node and obtaining WICD credentials from that node. Red Hat Security Ratings classify this as Important because a successful attack grants cluster-administrator access from a compromised Windows node. The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.