Privilege escalation in Red Hat Openshift Container Platform 4
CVE-2026-54099
A flaw was found in the Windows Machine Config Operator (WMCO) for Red Hat OpenShift Container Platform. The WICD CSR auto-approver validates that a Certificate Signing Request contains the organization system:wicd-nodes but does not reject additional organization values such as system:masters. A compromised Windows worker node that holds WICD credentials can submit a CSR that is auto-approved and signed by the cluster, yielding a client certificate that grants cluster-administrator privileges and enabling full cluster takeover.
Vulnerability class: Privilege Escalation
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.001 (1.1th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 1st percentile — 1.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.001 · newest: 0.001 · change: 0.000
Affected products
Weakness classification (CWE)
References
- access.redhat.com/security/cve/CVE-2026-54099 (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-2026-54099?
- CVE-2026-54099 is a high-severity vulnerability in Red Hat Openshift Container Platform 4, classified under Improper Privilege Management. CVSS score: 8.8/10. Published 2026-06-22.
- How severe is CVE-2026-54099?
- High severity. CVSS v3 base score is 8.8 out of 10.