8.8
High
CVE-2026-54099 Windows-machine-config-operator: windows-machine-config-operator: wicd csr extra-organization allows privilege escalation to system:masters
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 3.1 detail
Vector CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:HExploitable with local access to the machine, with an ordinary account and without any user action; an attacker can seriously compromise confidentiality, integrity or availability.
- Attack vector
- Local
- Attack complexity
- Low
- Privileges required
- Low
- Interaction
- None
- Scope
- Changed
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| Red Hat OpenShift Container Platform 4 | Versions not published | |
| Red Hat OpenShift for Windows Containers | Versions not published | |
| Red Hat OpenShift for Windows Containers 10.22 1783692800 | earliest → < 1783692800 | 1783692800 |
| Red Hat OpenShift for Windows Containers 10.21 1787065708 | earliest → < 1787065708 | 1787065708 |
| OpenShift Windows Machine Config Operator 10.21 1787065708 | earliest → < 1787065708 | 1787065708 |
| Red Hat OpenShift for Windows Containers 10.19 1789075615 | earliest → < 1789075615 | 1789075615 |
| Red Hat OpenShift for Windows Containers 10.20 1789075603 | earliest → < 1789075603 | 1789075603 |
| Red Hat OpenShift for Windows Containers 11.0 1793279001 | earliest → < 1793279001 | 1793279001 |
References
- RHSA-2026:47173 access.redhat.com
- RHSA-2026:61780 access.redhat.com
- RHSA-2026:81397 access.redhat.com
- RHSA-2026:82440 access.redhat.com
- RHSA-2026:94562 access.redhat.com
- access.redhat.com access.redhat.com
- RHBZ#2487950 bugzilla.redhat.com
Timeline
- Published
- Last modified
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