How severe is CVE-2026-54099?

CVE-2026-54099 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-54099 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (1st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-54099?

CVE-2026-54099 primarily affects Redhat Openshift Container Platform. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2026-54099?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-54099 have an EU (EUVD) identifier?

Yes. CVE-2026-54099 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-38233.

When was CVE-2026-54099 published?

CVE-2026-54099 was published on 2026-06-22 and last updated on 2026-07-08.

CVE-2026-54099

CVE-2026-54099 is a high-severity vulnerability in Redhat Openshift Container Platform with a CVSS 3.x base score of 8.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-269.

Key facts

Severity: High (CVSS 3.x base score 8.8)
EPSS exploit prediction: 0% (1st percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-38233
Weakness: CWE-269
Affected product: Redhat Openshift Container Platform
Published: 2026-06-22
Last modified: 2026-07-08

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.

Frequently asked questions

What is CVE-2026-54099?: 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.
How severe is CVE-2026-54099?: CVE-2026-54099 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-54099 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (1st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-54099?: CVE-2026-54099 primarily affects Redhat Openshift Container Platform. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2026-54099?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-54099 have an EU (EUVD) identifier?: Yes. CVE-2026-54099 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-38233.
When was CVE-2026-54099 published?: CVE-2026-54099 was published on 2026-06-22 and last updated on 2026-07-08.

References

Affected products (2)

cpe:2.3:a:redhat:openshift_container_platform:*:*:*:*:*:*:*:*
cpe:2.3:a:redhat:windows_machine_config_operator:-:*:*:*:*:*:*:*

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