CVE-2026-54099

Status: ModifiedHigh (8.8)—

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.

CVSS

Version: 3.1
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Base score: 8.8

Exploitation probability (EPSS)

Probability of exploitation in the next 30 days: 0.11%
Percentile among all scored CVEs: 1
Score date: 10/5/2026

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

🎯 ATT&CK techniques

How this vulnerability is exploited and what the attacker gains, in MITRE ATT&CK terms.

ExploitationT1068 Exploitation for Privilege Escalationprivilege escalation95 %
Secondary impactT1098.003 Additional Cloud Rolespersistence · privilege escalation85 %

Acceso local (AV:L, PR:L) sin interacción permite escalar privilegios mediante CSR manipulado que obtiene certificado de administrador de clúster, logrando control total.

Inferred by our analysis agent from the official description, CVSS vector and CWE, and checked by a supervisor. May contain errors.

🛡️ ATT&CK mitigations that cover these techniques

User Account Management Threat Intelligence Program Privileged Account Management Multi-factor Authentication Execution Prevention Application Isolation and Sandboxing

Affected technologies (2)

Redhat — Openshift Container Platform Redhat — Windows Machine Config Operator

CWEs

CWE-269
CWE-269

References

Raw JSON (NVD)

Show

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