CVE-2026-66783
HighCVSS 8.2Exploitation Probability (EPSS)
Low risk3th percentile - higher than 3% of all known CVEs
Summary
A flaw in the submariner-operator component of Red Hat Advanced Cluster Management for Kubernetes 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 arbitrary code execution with elevated privileges across the entire cluster, including control-plane nodes, by deploying a malicious image.
Risk Assessment
An attacker can gain full control over the Kubernetes cluster, compromising integrity, confidentiality, and availability of all resources.
Recommendation
Restrict permissions to modify Submariner CR to trusted administrators only and apply updates provided by Red Hat.
Original NVD description (English source)
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.