Vulnerability in Red Hat Openshift Container Platform 4
CVE-2026-54100
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.
Vulnerability class: Improper Certificate Validation
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.3 (High). Vector: CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.003 (20.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 20th percentile — 20.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: +0.000
Affected products
Weakness classification (CWE)
References
- access.redhat.com/security/cve/CVE-2026-54100 (vdb-entry, Vendor Advisory)
- bugzilla.redhat.com/show_bug.cgi (issue-tracking, Issue Tracking, Vendor Advisory)
- 0b0ca135-0b70-47e7-9f44-1890c2a1c46c (Vendor Advisory)
- access.redhat.com/errata/RHSA-2026:47173 (vendor-advisory)
- access.redhat.com/errata/RHSA-2026:61780 (vendor-advisory)
Frequently asked questions
- What is CVE-2026-54100?
- CVE-2026-54100 is a high-severity vulnerability in Red Hat Openshift Container Platform 4, classified under Improper Certificate Validation. CVSS score: 8.3/10. Published 2026-06-22.
- How severe is CVE-2026-54100?
- High severity. CVSS v3 base score is 8.3 out of 10.