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Vulnerability record · CVE-2026-54099 · published 22 June 2026

CVE-2026-54099: Redhat openshift container platform improper privilege management vulnerability

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.

8.8 CVSS 3.1 High EPSS 0.11% · top 98.9% CWE-269 · Improper privilege management
8.8CVSS 3.1 base score
0.11%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
9References
9 Sep 2026Last modified by NVD

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

Affected products

2 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://access.redhat.com/errata/RHSA-2026:47173
https://access.redhat.com/errata/RHSA-2026:61780
https://access.redhat.com/security/cve/CVE-2026-54099 Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2487950 Issue TrackingVendor Advisory
https://access.redhat.com/errata/RHSA-2026:47173
https://access.redhat.com/errata/RHSA-2026:61780
https://access.redhat.com/security/cve/CVE-2026-54099 Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2487950 Issue TrackingVendor Advisory
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-54099.json Vendor Advisory

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Source: NIST National Vulnerability Database (record CVE-2026-54099), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.