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.

Scores

Faiblesses (CWE)

• CWE-269

Références européennes

• ENISA EUVD · EUVD-2026-38233
• GCVE · GCVE-0-2026-54099

Configurations affectées (CPE NVD)

• cpe:2.3:a:redhat:openshift_container_platform:*:*:*:*:*:*:*:* ≥ 4.0 < 4.22.1
• cpe:2.3:a:redhat:windows_machine_config_operator:-:*:*:*:*:*:*:*

Produits affectés

Références

• https://access.redhat.com/errata/RHSA-2026:47173
• https://access.redhat.com/errata/RHSA-2026:61780
• https://access.redhat.com/errata/RHSA-2026:81397
• https://access.redhat.com/errata/RHSA-2026:82440
• https://access.redhat.com/security/cve/CVE-2026-54099
• https://bugzilla.redhat.com/show_bug.cgi?id=2487950
• https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-54099.json

Sources