Cluster-admin capability via auto-approved CSR enables full OpenShift takeover.
CVE-2026-54099
CSR auto-approval flaw yields cluster-admin cert, enabling takeover
Is CVE-2026-54099 being exploited?
Not confirmed. CVE-2026-54099 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.11% probability of exploitation in the next 30 days.
How severe is CVE-2026-54099?
CVE-2026-54099 is rated High with a CVSS score of 8.8. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-54099?
Yes. A fix has been recorded for CVE-2026-54099. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-54099 affect?
CVE-2026-54099 affects Windows Machine Config Operator (WMCO), Red Hat OpenShift Container Platform. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-54099?
Patch when available; disable auto-approval; rotate WICD credentials
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Compromised Windows WMCO node can submit an auto-approved CSR to obtain a cluster-admin cert, enabling takeover.
Patch when possible