8.3High
CVE-2026-54100Windows-machine-config-operator: windows-machine-config-operator: ssh host key not verified enables credential theft
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.
Weakness (CWE):
CWE-295
Data: CVE.org, NVD, CISA KEV, FIRST EPSS, Ubuntu. Published as the sources state it, in English.
Affected products and versions
| Vendor | Product | Versions | |
|---|---|---|---|
| redhat | openshift container platform | 4.0 – ≤ 4.22.1 | |
| Red Hat | Red Hat OpenShift Container Platform 4 | all versions | |
| Red Hat | Red Hat OpenShift for Windows Containers 10.19 | all versions | |
| Red Hat | Red Hat OpenShift for Windows Containers 10.20 | all versions | |
| Red Hat | Red Hat OpenShift for Windows Containers 10.21 | all versions | |
| Red Hat | Red Hat OpenShift for Windows Containers 10.22 | all versions | |
| redhat | windows machine config operator | — | |
| windows machine config | 10.19 | — | |
| windows machine config | 10.20 | — | |
| windows machine config | 10.21 | — | |
| windows machine config | 10.22 | — |
References and patches
- RHSA-2026:47173 vendor-advisory
- RHSA-2026:61780 vendor-advisory
- RHSA-2026:81397 vendor-advisory
- RHSA-2026:82440 vendor-advisory
- https://access.redhat.com/security/cve/CVE-2026-54100 vdb-entryVendor Advisory
- RHBZ#2487953 issue-trackingIssue TrackingVendor Advisory
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-54100.json Vendor Advisory
CPE matches (NVD) (2)
cpe:2.3:a:redhat:openshift_container_platform:*:*:*:*:*:*:*:*≥ 4.0 ≤ 4.22.1cpe:2.3:a:redhat:windows_machine_config_operator:-:*:*:*:*:*:*:*