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Windows-machine-config-operator: windows-machine-config-operator: wicd csr extra-organization allows privilege escalation to system:masters

Type: advisorySource: Official CVE List1 source record

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.

Announced Group revision 1
Original source ↗

CVE-2026-54099

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: cve:CVE-2026-54099

Red Hat OpenShift for Windows Containers 10.19

Source reference: /containers/cna/affected/0/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Red Hat OpenShift for Windows Containers 10.20

Source reference: /containers/cna/affected/1/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Red Hat OpenShift for Windows Containers 10.21

Source reference: /containers/cna/affected/2/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Red Hat OpenShift for Windows Containers 10.22

Source reference: /containers/cna/affected/3/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Red Hat OpenShift Container Platform 4

Source reference: /containers/cna/affected/4/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Red Hat OpenShift Container Platform 4

Source reference: /containers/cna/affected/5/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "cpes": [
      "cpe:/a:redhat:windows_machine_config:10.19::el9"
    ],
    "vendor": "Red Hat",
    "product": "Red Hat OpenShift for Windows Containers 10.19",
    "versions": [
      {
        "status": "unaffected",
        "version": "1789075615",
        "lessThan": "*",
        "versionType": "rpm"
      }
    ],
    "packageName": "openshift4-wincw/windows-machine-config-rhel9-operator",
    "collectionURL": "https://catalog.redhat.com/software/containers/",
    "defaultStatus": "affected"
  },
  {
    "cpes": [
      "cpe:/a:redhat:windows_machine_config:10.20::el9"
    ],
    "vendor": "Red Hat",
    "product": "Red Hat OpenShift for Windows Containers 10.20",
    "versions": [
      {
        "status": "unaffected",
        "version": "1789075603",
        "lessThan": "*",
        "versionType": "rpm"
      }
    ],
    "packageName": "openshift4-wincw/windows-machine-config-rhel9-operator",
    "collectionURL": "https://catalog.redhat.com/software/containers/",
    "defaultStatus": "affected"
  },
  {
    "cpes": [
      "cpe:/a:redhat:windows_machine_config:10.21::el9"
    ],
    "vendor": "Red Hat",
    "product": "Red Hat OpenShift for Windows Containers 10.21",
    "versions": [
      {
        "status": "unaffected",
        "version": "1787065708",
        "lessThan": "*",
        "versionType": "rpm"
      }
    ],
    "packageName": "openshift4-wincw/windows-machine-config-rhel9-operator",
    "collectionURL": "https://catalog.redhat.com/software/containers/",
    "defaultStatus": "affected"
  },
  {
    "cpes": [
      "cpe:/a:redhat:windows_machine_config:10.22::el9"
    ],
    "vendor": "Red Hat",
    "product": "Red Hat OpenShift for Windows Containers 10.22",
    "versions": [
      {
        "status": "unaffected",
        "version": "1783692800",
        "lessThan": "*",
        "versionType": "rpm"
      }
    ],
    "packageName": "openshift4-wincw/windows-machine-config-rhel9-operator",
    "collectionURL": "https://catalog.redhat.com/software/containers/",
    "defaultStatus": "affected"
  },
  {
    "cpes": [
      "cpe:/a:redhat:openshift:4"
    ],
    "vendor": "Red Hat",
    "product": "Red Hat OpenShift Container Platform 4",
    "packageName": "openshift4-wincw/windows-machine-config-rhel8-operator",
    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
    "defaultStatus": "affected"
  },
  {
    "cpes": [
      "cpe:/a:redhat:openshift:4"
    ],
    "vendor": "Red Hat",
    "product": "Red Hat OpenShift Container Platform 4",
    "packageName": "openshift4-wincw/windows-machine-config-rhel9-operator",
    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-54099

Source reference: /cveMetadata/cveId

Publisher severity

high

Source reference: /containers/cna/metrics

Event
#21407 · Revision 1
Added to Heist Feed
Publisher date
Read the original announcement

Revision history

  1. CVE-2026-54099 · Revision 1Source updated