CVE-2026-54099Windows-machine-config-operator: windows-machine-config-operator: wicd csr extra-organization allows privilege escalation to system:masters
- 8.8HighCVSS base score
- 0.13%Exploitation in 30 daysEPSS · top 97% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
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.
Timeline
ID reserved
By redhat
- 11 days later
· 11 days later
Published
- 5 months later
· 5 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| redhatCNA (assigner) | 3.1 | High8.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H |
| redhat-SADPADP (enrichment) | 3.1 | High8.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H |
| NVDNVD · Modified | 3.1 | High8.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.13% · top 97% of all CVEs (12 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: total
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 8.8.
Affected products
Red Hat · Red Hat OpenShift for Windows Containers 10.19
- unaffected 1789075615 – < *
Red Hat · Red Hat OpenShift for Windows Containers 10.20
- unaffected 1789075603 – < *
Red Hat · Red Hat OpenShift for Windows Containers 10.21
- unaffected 1787065708 – < *
Red Hat · Red Hat OpenShift for Windows Containers 10.22
- unaffected 1783692800 – < *
Red Hat · Red Hat OpenShift for Windows Containers 11.0
- unaffected 1793279001 – < *
Red Hat · Red Hat OpenShift Container Platform 4
All versions: affected
Red Hat · Red Hat OpenShift Container Platform 4
All versions: affected
What to do
Workaround: At this time, no mitigation or workaround is available for this vulnerability. Customers are advised to apply the appropriate updates as they become available.
References
References8
- RHSA-2026:47173 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- RHSA-2026:61780 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- RHSA-2026:81397 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- RHSA-2026:82440 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- RHSA-2026:94562 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/security/cve/CVE-2026-54099 (opens in a new tab)vdb-entryx_refsource_REDHAT
- RHBZ#2487950 (opens in a new tab)issue-trackingx_refsource_REDHAT
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-54099.json (opens in a new tab)x_sadp-csaf-vex
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-38233 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-54099)Record last updated .