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Vulnerability · Published Jun 22, 2026 · Assigned by redhat

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

High 8.3

In plain English

A high-severity improper certificate validation in Red Hat OpenShift Container Platform 4 from Red Hat. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 23% of all known vulnerabilities).

Severity (CVSS 3.1)8.3High
Exploit odds (30 days)0.3%top 76.9% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official 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 (as reported)

VendorProductVersions
Red Hat Red Hat OpenShift for Windows Containers 10.19 see references
Red Hat Red Hat OpenShift for Windows Containers 10.20 see references
Red Hat Red Hat OpenShift for Windows Containers 10.21 see references
Red Hat Red Hat OpenShift for Windows Containers 10.22 see references
Red Hat Red Hat OpenShift Container Platform 4 see references
Red Hat Red Hat OpenShift Container Platform 4 see references

Weakness: CWE-295 · Vector: CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H

References