CVE-2026-54099
Windows-machine-config-operator: windows-machine-config-operator: wicd csr extra-organization allows privilege escalation to system:masters
- State
- Published
- Severity
- 8.8 High
- Published
- Jun 22, 2026
- Updated
- Oct 14, 2026
- Reserved
- Jun 11, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 8.8 High | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H | redhat |
| 3.1 | 8.8 High | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H | redhat-SADP |
Weaknesses
- CWE-269 Improper Privilege Management
Affected Products
| Product | Versions |
|---|---|
Red Hat OpenShift for Windows Containers 10.19Red Hat |
|
Red Hat OpenShift for Windows Containers 10.20Red Hat |
|
Red Hat OpenShift for Windows Containers 10.21Red Hat |
|
Red Hat OpenShift for Windows Containers 10.22Red Hat |
|
Red Hat OpenShift Container Platform 4Red Hat | |
Red Hat OpenShift Container Platform 4Red Hat |
References
- RHSA-2026:47173vendor-advisory
- RHSA-2026:61780vendor-advisory
- RHSA-2026:81397vendor-advisory
- RHSA-2026:82440vendor-advisory
- https://access.redhat.com/security/cve/CVE-2026-54099vdb-entry
- RHBZ#2487950issue-tracking
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-54099.json
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