Red Hat Security Advisory: Red Hat OpenShift for Windows Containers 10.21.2 product release
Affects Red HatSource GCVE Database
Not known to be exploited · CVSS 8.8 High.
Data as of 4 Nov 2026, 06:33 UTC
Sources agree
| CNA (redhat) | CVSS 3.1 | 8.8 |
|---|---|---|
| ADP (redhat-SADP) | CVSS 3.1 | 8.8 |
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 3 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
Currently, no mitigation or workaround is available for this vulnerability. Customers should monitor Red Hat advisories and apply the appropriate updates as soon as they become available to remediate this issue.
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. The flaw involves the WICD CSR auto-approver accepting additional organization values in certificate signing requests, enabling an attacker with WICD credentials to obtain cluster-administrator privileges. 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
- access.redhat.com/errata/RHSA-2026:61780 (opens in a new tab)
- access.redhat.com/security/cve/CVE-2026-54099 (opens in a new tab)
- access.redhat.com/security/cve/CVE-2026-54100 (opens in a new tab)
- access.redhat.com/security/updates/classification/ (opens in a new tab)
- docs.redhat.com/en/documentation/openshift_container_platform/4.21/html/windows_container_support_for_openshift/enabling-windows-container-workloads (opens in a new tab)
- security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_61780.json (opens in a new tab)