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Vulnerability record · CVE-2026-54100 · published 22 June 2026

CVE-2026-54100: Redhat openshift container platform improper certificate validation vulnerability

Redhat · Openshift Container Platform

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.

8.3 CVSS 3.1 High EPSS 0.30% · top 79.7% CWE-295 · Improper certificate validation
8.3CVSS 3.1 base score
0.30%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
9References
9 Sep 2026Last modified by NVD

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:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H

Affected products

2 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
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 Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2487953 Issue TrackingVendor Advisory
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 Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2487953 Issue TrackingVendor Advisory
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-54100.json Vendor Advisory

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Source: NIST National Vulnerability Database (record CVE-2026-54100), CISA KEV, FIRST EPSS (scores of 2026-09-29). This page is refreshed as NVD updates the record.