CVE-2026-66783

highCVSS 8.2covered by 1 sourcefirst seen 2026-08-18

A flaw was found in the submariner-operator component of Red Hat Advanced Cluster Management for Kubernetes. This vulnerability allows a cluster administrator, or any user with permissions to modify the Submariner Custom Resource (CR), to specify an unvalidated image path. This lack of validation enables an attacker to execute arbitrary code with elevated privileges across the entire cluster, including control-plane nodes, by deploying a malicious image.

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Exploitation outlook

Low exploitation risk0.13% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 3% of all EPSS-scored CVEs.

Advisory coverage (1)

highCVE-2026-66783: A flaw was found in the `submariner-operator` component of Red Hat Advanced Cluster Management…nvd · 2026-08-18

External references

NVD record for CVE-2026-66783

CVE.org record

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