What’s Vulnerable › Vulnerabilities

CVE-2026-54100: Windows-machine-config-operator: windows-machine-config-operator: ssh host key not verified enables credential theft

• Severity: high (CVSS 8.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-06-22 · updated 2026-10-14
• Weakness: CWE-295

Description

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 products

• Red Hat OpenShift Container Platform 4.18: from 4.0 through 4.22.1
• RedHat Windows Machine Config Operator: all versions

References

• https://access.redhat.com/errata/RHSA-2026:47173
• https://access.redhat.com/errata/RHSA-2026:61780
• https://access.redhat.com/errata/RHSA-2026:81397
• https://access.redhat.com/errata/RHSA-2026:82440
• https://access.redhat.com/security/cve/CVE-2026-54100
• https://bugzilla.redhat.com/show_bug.cgi?id=2487953
• https://access.redhat.com/errata/RHSA-2026:47173
• https://access.redhat.com/errata/RHSA-2026:61780
• 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

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