CVE-2026-54100: Improper Certificate Validation in Red Hat Red Hat OpenShift Container Platform 4
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.
AI Analysis
Technical Summary
The vulnerability CVE-2026-54100 affects the Windows Machine Config Operator (WMCO) in Red Hat OpenShift Container Platform 4. WMCO fails to validate the SSH host key when connecting to Windows worker nodes. This improper certificate validation enables an attacker with adjacent network access to intercept or redirect SSH sessions and capture WICD and kubelet bootstrap credentials used during node configuration. The compromise of these credentials can lead to the attacker assuming the identity of Windows nodes in the cluster, impacting confidentiality, integrity, and availability.
Potential Impact
An attacker with adjacent network access can intercept or redirect SSH connections from WMCO to Windows worker nodes and capture sensitive bootstrap credentials. This can lead to compromise of Windows node identities in the cluster, potentially allowing unauthorized access and control over those nodes. The CVSS score of 8.3 reflects high impact on confidentiality, integrity, and availability.
Mitigation Recommendations
Patch status is not yet confirmed — check the Red Hat advisory at https://access.redhat.com/security/cve/CVE-2026-54100 for current remediation guidance. No official fix or workaround is stated in the provided data. Until a patch is available, limit adjacent network access to WMCO SSH connections and monitor for suspicious network activity related to node configuration.
CVE-2026-54100: Improper Certificate Validation in Red Hat Red Hat OpenShift Container Platform 4
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 v3.1
Score 8.3high
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability CVE-2026-54100 affects the Windows Machine Config Operator (WMCO) in Red Hat OpenShift Container Platform 4. WMCO fails to validate the SSH host key when connecting to Windows worker nodes. This improper certificate validation enables an attacker with adjacent network access to intercept or redirect SSH sessions and capture WICD and kubelet bootstrap credentials used during node configuration. The compromise of these credentials can lead to the attacker assuming the identity of Windows nodes in the cluster, impacting confidentiality, integrity, and availability.
Potential Impact
An attacker with adjacent network access can intercept or redirect SSH connections from WMCO to Windows worker nodes and capture sensitive bootstrap credentials. This can lead to compromise of Windows node identities in the cluster, potentially allowing unauthorized access and control over those nodes. The CVSS score of 8.3 reflects high impact on confidentiality, integrity, and availability.
Mitigation Recommendations
Patch status is not yet confirmed — check the Red Hat advisory at https://access.redhat.com/security/cve/CVE-2026-54100 for current remediation guidance. No official fix or workaround is stated in the provided data. Until a patch is available, limit adjacent network access to WMCO SSH connections and monitor for suspicious network activity related to node configuration.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- redhat
- Date Reserved
- 2026-06-11T19:02:42.736Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
- Vendor Advisory Urls
- [{"url":"https://access.redhat.com/security/cve/CVE-2026-54100","vendor":"Red Hat"}]
Threat ID: 6a393e8aeed863c81ee5cd6d
Added to database: 06/22/2026, 13:54:18 UTC
Last enriched: 06/22/2026, 14:09:39 UTC
Last updated: 06/23/2026, 01:01:04 UTC
Views: 10
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