{"id":"CVE-2026-54099","title":"A flaw was found in the Windows Machine Config Operator (WMCO) for Red Hat OpenShift Container Platform","summary":"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 rej…","severity":"high","cvss":8.8,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","cwe":["CWE-269"],"vendor":"redhat","product":"openshift_container_platform","affected":["openshift_container_platform >= 4.0, < 4.22.1","windows_machine_config_operator"],"patched":["openshift_container_platform 4.22.1"],"published":"2026-06-22","updated":"2026-09-09","sourceUpdated":"2026-09-09T13:20:30.257","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-54099","references":[{"url":"https://access.redhat.com/errata/RHSA-2026:47173","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:61780","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/security/cve/CVE-2026-54099","label":"secalert@redhat.com"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2487950","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:47173","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:61780","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/security/cve/CVE-2026-54099","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2487950","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-54099.json","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-54099"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-54099"}],"tags":["nvd","cve.org","csaf","vex","red-hat"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"total","timestamp":"2026-06-22T00:00:00+00:00"},"epss":0.0011,"epssPercentile":0.01418,"ingestedAt":"2026-07-29T13:46:57.117Z","slug":"CVE-2026-54099","body":"## Overview\n\nA 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.\n\n## Affected\n\n- `openshift_container_platform >= 4.0, < 4.22.1`\n- `windows_machine_config_operator`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `openshift_container_platform 4.22.1`\n\n## Vendor advisories\n\n- **RHSA-2026:61780** · Red Hat · fixed in: Red Hat OpenShift for Windows Containers 10.21 · released 2026-08-31 · [advisory](https://access.redhat.com/errata/RHSA-2026:61780)\n- **RHSA-2026:47173** · Red Hat · fixed in: Red Hat OpenShift for Windows Containers 10.22 · released 2026-07-28 · [advisory](https://access.redhat.com/errata/RHSA-2026:47173)\n- **Red Hat VEX** · Important · affected: Red Hat OpenShift Container Platform 4 · no fix planned: Red Hat OpenShift Container Platform 4 · updated 2026-09-08 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-54099.json)","depth":"twilight","depthScore":48,"depthScoreParts":{"impact":48.4,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}