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CVE-2026-54099VulnerabilityPublished Updated

Red Hat Security Advisory: Red Hat OpenShift for Windows Containers 10.22.1 product release

Affects Red HatSource GCVE Database

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Authoritative record:CVE-2026-54099· High 8.8

Not known to be exploited · CVSS 8.8 High.

Data as of 4 Nov 2026, 06:33 UTC

CVSS 3.1 base score
8.8High
How severe the flaw is on the 0–10 CVSS scale.

Sources agree

CVSS scores by source
CNA (redhat)CVSS 3.18.8
ADP (redhat-SADP)CVSS 3.18.8
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 22 Jun 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 3 Nov 2026.

What to do

Affected software

ProductAffectedFixed in
Red Hat OpenShift for Windows Containers 10.19openshift4-wincw/windows-machine-config-rhel9-operatorAffected–Fixed in–
Red Hat OpenShift for Windows Containers 10.20openshift4-wincw/windows-machine-config-rhel9-operatorAffected–Fixed in–
Red Hat OpenShift for Windows Containers 10.21openshift4-wincw/windows-machine-config-rhel9-operatorAffected–Fixed in–
Red Hat OpenShift for Windows Containers 10.22openshift4-wincw/windows-machine-config-rhel9-operatorAffected–Fixed in–
Red Hat OpenShift for Windows Containers 11.0openshift4-wincw/windows-machine-config-rhel9-operatorAffected–Fixed in–
Red Hat OpenShift Container Platform 4openshift4-wincw/windows-machine-config-rhel8-operatorAffected–Fixed in–

AI-suggested

Currently, no mitigation or workaround is available for this vulnerability. Customers are advised to apply the appropriate updates from Red Hat OpenShift for Windows Containers 10.22.1 or later once they become available. Monitoring Red Hat advisories for patch releases is recommended.

Description

A vulnerability in the Windows Machine Config Operator (WMCO) for Red Hat OpenShift Container Platform allows a compromised Windows worker node to escalate privileges to cluster-administrator level. The flaw involves improper validation of Certificate Signing Requests (CSRs), where additional organization values such as system:masters are not rejected, enabling privilege escalation. This affects OpenShift clusters running WMCO with Windows nodes. No mitigation or workaround is currently available, and a fix is expected in future updates.

References

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