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Windows-machine-config-operator: windows-machine-config-operator: ssh host key not verified enables credential theft

Type: advisorySource: Official CVE List1 source record

A flaw was found in the Windows Machine Config Operator (WMCO) for Red Hat OpenShift Container Platform. WMCO establishes SSH connections to Windows worker nodes without verifying the remote server host key. An adjacent-network attacker who can intercept or redirect WMCO's SSH session can capture WICD and kubelet bootstrap credentials transferred during node configuration, enabling compromise of Windows node identities in the cluster.

Announced Source revision 1
Original source ↗

CVE-2026-54100

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-2026-54100

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-2026-54100

Source reference: /cveMetadata/cveId

Publisher severity

high

Source reference: /containers/cna/metrics

Event
#21408 · Revision 1
Added to Heist Feed
Publisher date
Read the original announcement