Is CVE-2026-66793 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-66793?

CVE-2026-66793 has a CVSS v3 severity of HIGH (8.8).

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CVE-2026-66793

Description

A flaw was found in the governance-policy-addon-controller component of Red Hat Advanced Cluster Management for Kubernetes. A user with permissions to annotate the namespaced ManagedClusterAddOn resource can override the governance-policy container image. This allows an attacker to run a controlled image with cluster-admin privileges on the managed cluster, leading to arbitrary code execution and privilege escalation.