Vulnerability details
CVE-2026-54099
Red Hat OpenShift Container Platform 4
Windows-machine-config-operator: windows-machine-config-operator: wicd csr extra-organization allows privilege escalation to system:masters
CVSS 3.1
8.8High
Official 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.
CVSS scores
| Score | Version | Source | Vector |
|---|---|---|---|
| 8.8High | 3.1 | CVEProject cvelistV5 (CNA) (redhat) | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H |
| 8.8High | 3.1 | CVEProject cvelistV5 (CNA) (redhat-SADP) | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H |
Affected products
| Vendor | Product | Versions | Source |
|---|---|---|---|
| Red Hat | Red Hat OpenShift Container Platform 4 | All | CVEProject cvelistV5 (CNA) |
| Red Hat | Red Hat OpenShift Container Platform 4 | All | CVEProject cvelistV5 (CNA) |
| Red Hat | Red Hat OpenShift Container Platform 4 | All | CVEProject cvelistV5 (CNA) |
| Red Hat | Red Hat OpenShift Container Platform 4 | All | CVEProject cvelistV5 (CNA) |
References and advisories
8- https://access.redhat.com/errata/RHSA-2026:81397 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:82440 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:94562 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/security/cve/CVE-2026-54099 vdb-entryx_refsource_REDHAT
- https://bugzilla.redhat.com/show_bug.cgi?id=2487950 issue-trackingx_refsource_REDHAT
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-54099.json x_sadp-csaf-vex
- https://access.redhat.com/errata/RHSA-2026:61780 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:47173 vendor-advisoryx_refsource_REDHAT
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Details
- Published
- 2026-06-22
- Last updated
- 2026-11-04
- State
- Published
- Assigner (CNA)
- redhat
Exploit prediction (EPSS)
0.13%
Probability of exploitation in 30 days
2.7%
Percentile (among all CVEs)
SSVC assessment (CISA)
- Automatable
- No
- Exploitation
- None
- Technical impact
- Total
Weaknesses (CWE)
- CWE-269Improper Privilege Management