CVE-2026-54099

Cluster-administrator escalation via unchecked CSR organizations

Published Jun 22, 2026 · Updated Jun 22, 2026

Privilege escalation in Red Hat OpenShift Container Platform allows local users to gain cluster-administrator access via a crafted CSR. The WICD CSR auto-approver checks only for the system:wicd-nodes organization and accepts extra values, including system:masters, before signing the request. Reachability requires control of a Windows worker node holding WICD credentials; the resulting client certificate enables full cluster takeover.

CVSS severity8.8
High
EPSS probability0.11%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Privilege escalation in Red Hat OpenShift Container Platform allows local users to gain cluster-administrator access via a crafted CSR. The WICD CSR auto-approver checks only for the system:wicd-nodes organization and accepts extra values, including system:masters, before signing the request. Reachability requires control of a Windows worker node holding WICD credentials; the resulting client certificate enables full cluster takeover.

The record

CVE
CVE-2026-54099
Published
Jun 22, 2026
Updated
Jun 22, 2026
Vendor
389 Directory Server
Product
Red Hat OpenShift for Windows Containers
Classifications
CWE-269, T1098
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 22, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 22, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Affected versions are unavailable in this record. Check the vendor advisory for version and patch details.

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

389 Directory Server · Red Hat OpenShift for Windows ContainersAffected versions are unavailable in this record.
389 Directory Server · Red Hat OpenShift Container PlatformAffected versions are unavailable in this record.

Published CVSS scores

8.8Red Hat, Inc.CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-269Improper Privilege Management
T1098Account Manipulation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo