CVE-2026-54099
highA flaw was found in the Windows Machine Config Operator (WMCO) for Red Hat OpenShift Container Platform.
Vendor / product: Redhat — openshift container platform
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/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H Affected products
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
References
- https://access.redhat.com/errata/RHSA-2026:47173 secalert@redhat.com
- https://access.redhat.com/errata/RHSA-2026:61780 secalert@redhat.com
- https://access.redhat.com/errata/RHSA-2026:81397 secalert@redhat.com
- https://access.redhat.com/errata/RHSA-2026:82440 secalert@redhat.com
- https://access.redhat.com/errata/RHSA-2026:94562 secalert@redhat.com
- https://access.redhat.com/security/cve/CVE-2026-54099 secalert@redhat.com
- https://bugzilla.redhat.com/show_bug.cgi?id=2487950 secalert@redhat.com
- https://access.redhat.com/errata/RHSA-2026:47173 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
- https://access.redhat.com/errata/RHSA-2026:61780 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
- https://access.redhat.com/security/cve/CVE-2026-54099 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
- https://bugzilla.redhat.com/show_bug.cgi?id=2487950 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-54099.json 0b0ca135-0b70-47e7-9f44-1890c2a1c46c