CVE-2026-54099

HIGH

Red Hat OpenShift WMCO WICD CSR - Cluster-Admin Privilege Escalation

Title source: manual

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.

References (3)

Core 3

Core References

Vendor Advisory

https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-54099.json

Vdb Entry, X_Refsource_Redhat vdb-entry x_refsource_redhat

https://access.redhat.com/security/cve/CVE-2026-54099

Issue Tracking, X_Refsource_Redhat issue-tracking x_refsource_redhat

RHBZ#2487950

https://bugzilla.redhat.com/show_bug.cgi?id=2487950

Scores

CVSS v3 8.8

EPSS 0.0008

EPSS Percentile 0.1%

Attack Vector LOCAL

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact total

Details

CWE

CWE-269

Status published

Products (4)

Red Hat/Red Hat OpenShift Container Platform 4

Red Hat/Red Hat OpenShift for Windows Containers

redhat/openshift_container_platform 4.0 - 4.22.1

redhat/windows_machine_config_operator

Published Jun 22, 2026

Tracked Since Jun 22, 2026