High severity · published Jun 22, 2026
CVE-2026-54099
Windows-machine-config-operator: windows-machine-config-operator: wicd csr extra-organization allows privilege escalation to system:masters
8.8
CVSS
0.1%
EPSS
No
On KEV
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 vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.1% · higher than 2% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
RH
Red Hat OpenShift Container Platform 4 · Red Hat
All versions, or not specified · source: vendor, CISA
RH
Red Hat OpenShift for Windows Containers 10.19 · Red Hat
All versions, or not specified · source: vendor
RH
Red Hat OpenShift for Windows Containers 10.20 · Red Hat
All versions, or not specified · source: vendor
RH
Red Hat OpenShift for Windows Containers 10.21 · Red Hat
All versions, or not specified · source: vendor, CISA
RH
Red Hat OpenShift for Windows Containers 10.22 · Red Hat
All versions, or not specified · source: vendor, CISA
OC
Openshift Container Platform · Redhat
4.0 before 4.22.1 · source: NVD
WM
Windows Machine Config Operator · Redhat
All versions, or not specified · source: NVD
Affected product
RH
Red Hat OpenShift Container Platform 4
Red Hat
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