CVE-2026-54100

Summary

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.

Affected Software

Weaknesses

• CWE-295: Improper Certificate Validation

Workarounds

At this time, no mitigation or workaround is available for this vulnerability. Customers are advised to apply the appropriate updates as they become available.

ADP Enrichment

CISA ADP Vulnrichment

• SSVC:
• Exploitation: none
  • Automatable: no
  • Technical Impact: total

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

Additional References

• https://access.redhat.com/security/cve/CVE-2026-54100
• https://bugzilla.redhat.com/show_bug.cgi?id=2487953
• https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-54100.json

References

• https://access.redhat.com/security/cve/CVE-2026-54100
• https://bugzilla.redhat.com/show_bug.cgi?id=2487953

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