High severity · published Jun 22, 2026
CVE-2026-54100
Windows-machine-config-operator: windows-machine-config-operator: ssh host key not verified enables credential theft
8.3
CVSS
0.3%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
Attack vector
Adjacent
Complexity
High
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 23% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
RH
Red Hat OpenShift Container Platform 4 · Red Hat
All versions, or not specified · source: vendor, CISA
RH
Red Hat OpenShift for Windows Containers 10.19 · Red Hat
All versions, or not specified · source: vendor
RH
Red Hat OpenShift for Windows Containers 10.20 · Red Hat
All versions, or not specified · source: vendor
RH
Red Hat OpenShift for Windows Containers 10.21 · Red Hat
All versions, or not specified · source: vendor, CISA
RH
Red Hat OpenShift for Windows Containers 10.22 · Red Hat
All versions, or not specified · source: vendor, CISA
OC
Openshift Container Platform · Redhat
4.0 through 4.22.1 · source: NVD
WM
Windows Machine Config Operator · Redhat
All versions, or not specified · source: NVD
Affected product
RH
Red Hat OpenShift Container Platform 4
Red Hat
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