CVE-2026-17107
Authenticated hub can impersonate to gain cluster-admin on managed Kubernetes clusters.
Is CVE-2026-17107 being exploited?
Not confirmed. CVE-2026-17107 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 0.35% probability of exploitation in the next 30 days.
How severe is CVE-2026-17107?
CVE-2026-17107 is rated High with a CVSS score of 8.5. 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-2026-17107?
Yes. A fix has been recorded for CVE-2026-17107. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-17107 affect?
CVE-2026-17107 affects Red Hat Advanced Cluster Management (RHACM) cluster-proxy/service-proxy, multicluster-engine (MCE), Managed Kubernetes clusters. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-17107?
Apply vendor patch when released; restrict/rotate hub SA impersonation permissions now
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Authenticated hub principal can inject Impersonate-Group header to escalate to cluster-admin on every managed cluster, enabling full cluster takeover.
Immediate action required