CVE-2026-66793

highCVSS 8.8covered by 1 sourcefirst seen 2026-08-18

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.

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Exploitation outlook

Low exploitation risk0.57% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 45% of all EPSS-scored CVEs.

Advisory coverage (1)

highCVE-2026-66793: A flaw was found in the governance-policy-addon-controller component of Red Hat Advanced Clust…nvd · 2026-08-18

External references

NVD record for CVE-2026-66793

CVE.org record

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