CVE-2026-54099: Red Hat OpenShift for Windows Containers 10.19 · Improper Privilege Management
Affects Red Hat OpenShift for Windows Containers 10.19Source CVE Database V5
Not known to be exploited · CVSS 8.8 High · fixed in Red Hat OpenShift for Windows Containers 10.19 package updates : patch Red Hat OpenShift for Windows Containers 10.19 soon.
Data as of 5 Nov 2026, 11:40 UTC
Sources agree
| CNA (redhat) | CVSS 3.1 | 8.8 |
|---|---|---|
| ADP (redhat-SADP) | CVSS 3.1 | 8.8 |
- EPSS
- 0.1% chance of exploitation in 30 days – higher than 2% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in 10.22.1
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:HExploitation evidence
Disclosed: evidence found.
CVE published 22 Jun 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by 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 5 Nov 2026.
What to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| Red Hat OpenShift for Windows Containers 10.19openshift4-wincw/windows-machine-config-rhel9-operator | Affected– | Fixed in– |
| Red Hat OpenShift for Windows Containers 10.20openshift4-wincw/windows-machine-config-rhel9-operator | Affected– | Fixed in– |
| Red Hat OpenShift for Windows Containers 10.21openshift4-wincw/windows-machine-config-rhel9-operator | Affected– | Fixed in– |
| Red Hat OpenShift for Windows Containers 10.22openshift4-wincw/windows-machine-config-rhel9-operator | Affected– | Fixed in– |
| Red Hat OpenShift for Windows Containers 11.0openshift4-wincw/windows-machine-config-rhel9-operator | Affected– | Fixed in– |
| Red Hat OpenShift Container Platform 4openshift4-wincw/windows-machine-config-rhel8-operator | Affected– | Fixed in– |
AI-suggested
The vendor advisory indicates that Red Hat OpenShift for Windows Containers 10.22.1 is available, which addresses this issue. Users should upgrade to version 10.22.1 or later to remediate the vulnerability. The advisory references Windows Machine Config Operator upgrade documentation for guidance. No other temporary mitigations or workarounds are specified. Patch status is confirmed by the vendor advisory.
Description
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.
References
- access.redhat.com/errata/RHSA-2026:47173 (opens in a new tab)
- access.redhat.com/security/cve/CVE-2026-54099 (opens in a new tab)
- bugzilla.redhat.com/show_bug.cgi?id=2487950 (opens in a new tab)
- security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-54099.json (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:61780 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:81397 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:82440 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:94562 (opens in a new tab)