CVE-2026-66793
Annotation flaw lets attackers override governance-policy image to gain cluster-admin on managed clusters.
Is CVE-2026-66793 being exploited?
Not confirmed. CVE-2026-66793 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 0.76% probability of exploitation in the next 30 days.
How severe is CVE-2026-66793?
CVE-2026-66793 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-2026-66793?
Yes. A fix has been recorded for CVE-2026-66793. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-66793 affect?
CVE-2026-66793 affects Red Hat Advanced Cluster Management for Kubernetes, governance-policy-addon-controller, ManagedClusterAddOn resource. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-66793?
Restrict annotation rights, audit ManagedClusterAddOn annotations, apply vendor patch when released.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
A user with annotation rights can override the governance-policy container image to run a controlled image with cluster-admin privileges, enabling arbitrary code execution and full cluster compromise.
Immediate action required