CVE-2026-54099Windows-machine-config-operator: windows-machine-config-operator: wicd csr extra-organization allows privilege escalation to system:masters
Updated under an hour ago ()
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It affects Red Hat OpenShift for Windows Containers 10.19 and 3 other products. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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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
- 8.8 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
- Weakness (CWE)
- CWE-269
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- redhat
- NVD analysis
- Modified
- Record last updated
- Oct 14, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Red Hat Red Hat OpenShift for Windows Containers 10.19 redhat:windows_machine_config | from 1789075615 not affected | CNA record |
Red Hat Red Hat OpenShift Container Platform 4 redhat:openshift | 4 | CNA record |
Red Hat Red Hat OpenShift for Windows Containers 10.21 redhat:windows_machine_config | from 1787065708 not affected | CISA ADP |
Red Hat Red Hat OpenShift Container Platform 4 redhat:openshift | 4 | CISA ADP |
redhat openshift_container_platform redhat:openshift_container_platform | from 4.0 before 4.22.1 | NVD |
redhat windows_machine_config_operator redhat:windows_machine_config_operator | all versions | NVD |
References
- https://access.redhat.com/errata/RHSA-2026:47173vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2026:61780vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2026:81397vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2026:82440vendor-advisory, x-refsource-redhat
- https://access.redhat.com/security/cve/CVE-2026-54099vdb-entry, x-refsource-redhat, vendor-advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2487950issue-tracking, x-refsource-redhat, vendor-advisory
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-54099.jsonvendor-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.