# CVE-2026-54099: Windows-machine-config-operator: windows-machine-config-operator: wicd csr extra-organization allows privilege escalation to system:masters Status: published. Published: 2026-06-22. Updated: 2026-11-04. 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. ## Remediation - workaround: At this time, no mitigation or workaround is available for this vulnerability. Customers are advised to apply the appropriate updates as they become available. (source: CNA: redhat) - fix: RHSA-2026:61780: Red Hat OpenShift for Windows Containers 10.21 RHSA-2026:47173: Red Hat OpenShift for Windows Containers 10.22 (source: ADP: redhat-SADP) - workaround: At this time, no mitigation or workaround is available for this vulnerability. Customers are advised to apply the appropriate updates as they become available. (source: ADP: redhat-SADP) ## Affected products and versions - Red Hat / Red Hat OpenShift for Windows Containers 10.19 (openshift4-wincw/windows-machine-config-rhel9-operator): ≥ 1789075615; < * (unaffected, rpm). Source: CNA: redhat - Red Hat / Red Hat OpenShift for Windows Containers 10.20 (openshift4-wincw/windows-machine-config-rhel9-operator): ≥ 1789075603; < * (unaffected, rpm). Source: CNA: redhat - Red Hat / Red Hat OpenShift for Windows Containers 10.21 (openshift4-wincw/windows-machine-config-rhel9-operator): ≥ 1787065708; < * (unaffected, rpm). Source: CNA: redhat - Red Hat / Red Hat OpenShift for Windows Containers 10.22 (openshift4-wincw/windows-machine-config-rhel9-operator): ≥ 1783692800; < * (unaffected, rpm). Source: CNA: redhat - Red Hat / Red Hat OpenShift for Windows Containers 11.0 (openshift4-wincw/windows-machine-config-rhel9-operator): ≥ 1793279001; < * (unaffected, rpm). Source: CNA: redhat - Red Hat / Red Hat OpenShift Container Platform 4 (openshift4-wincw/windows-machine-config-rhel8-operator): Version range not reported. Source: CNA: redhat - Red Hat / Red Hat OpenShift Container Platform 4 (openshift4-wincw/windows-machine-config-rhel9-operator): Version range not reported. Source: CNA: redhat - Red Hat / Red Hat OpenShift for Windows Containers 10.21 (openshift4-wincw/windows-machine-config-rhel9-operator): ≥ 1787065708; < * (unaffected, rpm). Source: ADP: redhat-SADP - Red Hat / Red Hat OpenShift for Windows Containers 10.22 (openshift4-wincw/windows-machine-config-rhel9-operator): ≥ 1783692800; < * (unaffected, rpm). Source: ADP: redhat-SADP - Red Hat / Red Hat OpenShift Container Platform 4 (openshift4-wincw/windows-machine-config-rhel8-operator): Version range not reported. Source: ADP: redhat-SADP - Red Hat / Red Hat OpenShift Container Platform 4 (openshift4-wincw/windows-machine-config-rhel9-operator): Version range not reported. Source: ADP: redhat-SADP ## Severity and prioritization - CVSS 3.1: 8.8 (high); CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H; source: CNA: redhat - CVSS 3.1: 8.8 (high); CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H; source: ADP: redhat-SADP - CISA KEV: No listing in collected sources - EPSS: 0.12% as of 2026-11-03; percentile 1.63% - SSVC: exploitation none; automatable no; technical impact total; source ADP: CISA-ADP - Weaknesses: CWE-269 ## Exploit evidence No exploit evidence in collected sources. This is not proof of no exploitation. ## References - https://access.redhat.com/errata/RHSA-2026:47173 (CNA: redhat; vendor-advisory, x_refsource_REDHAT) - https://access.redhat.com/errata/RHSA-2026:61780 (CNA: redhat; vendor-advisory, x_refsource_REDHAT) - https://access.redhat.com/errata/RHSA-2026:81397 (CNA: redhat; vendor-advisory, x_refsource_REDHAT) - https://access.redhat.com/errata/RHSA-2026:82440 (CNA: redhat; vendor-advisory, x_refsource_REDHAT) - https://access.redhat.com/errata/RHSA-2026:94562 (CNA: redhat; vendor-advisory, x_refsource_REDHAT) - https://access.redhat.com/security/cve/CVE-2026-54099 (CNA: redhat; vdb-entry, x_refsource_REDHAT) - https://bugzilla.redhat.com/show_bug.cgi?id=2487950 (CNA: redhat; issue-tracking, x_refsource_REDHAT) - https://access.redhat.com/security/cve/CVE-2026-54099 (ADP: redhat-SADP; vdb-entry, x_refsource_REDHAT) - https://bugzilla.redhat.com/show_bug.cgi?id=2487950 (ADP: redhat-SADP; issue-tracking, x_refsource_REDHAT) - https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-54099.json (ADP: redhat-SADP; x_sadp-csaf-vex) - https://access.redhat.com/errata/RHSA-2026:61780 (ADP: redhat-SADP; vendor-advisory, x_refsource_REDHAT) - https://access.redhat.com/errata/RHSA-2026:47173 (ADP: redhat-SADP; vendor-advisory, x_refsource_REDHAT) ## Provenance - CNA: redhat: https://www.cve.org/CVERecord?id=CVE-2026-54099; retrieved 2026-11-04; source updated 2026-11-04 - FIRST EPSS: https://api.first.org/data/v1/epss?cve=CVE-2026-54099; retrieved 2026-11-04; source updated Not reported Revision: d5f3657bdbd89aee76b244b69c61d0cd21cc2dcac0121fc5f5703b9555061fbd Canonical: https://y2.dev/cve/CVE-2026-54099 ## Agent and API access Public CVE pages, Markdown, and JSON are free to read without an account or API key. - Public catalog: https://y2.dev/cve/index.json. 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