CVE-2026-54100
WMCO establishes SSH connections to Windows worker nodes without verifying the remote server host key.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.30%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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
- 8.3 HIGHCVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
- EPSS
- 0.30% probability · 22th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-295
- Affected
- redhat/openshift container platform · redhat/windows machine config operator
- Source
- secalert@redhat.com
References
- https://access.redhat.com/errata/RHSA-2026:47173
- https://access.redhat.com/errata/RHSA-2026:61780
- https://access.redhat.com/security/cve/CVE-2026-54100Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2487953Issue Tracking, Vendor Advisory
- https://access.redhat.com/errata/RHSA-2026:47173
- https://access.redhat.com/errata/RHSA-2026:61780
- https://access.redhat.com/security/cve/CVE-2026-54100Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2487953Issue Tracking, Vendor Advisory
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-54100.jsonVendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.