kube-hunter is a security assessment tool designed to identify vulnerabilities and security weaknesses in Kubernetes clusters. The tool performs automated scanning to discover potential security issues within Kubernetes environments and provides visibility into cluster security posture. The tool is available as a container image (aquasec/kube-hunter) and can be deployed directly within Kubernetes environments or run externally. It also offers a web-based interface at kube-hunter.aquasec.com where users can register to receive tokens for viewing and sharing scan results online. kube-hunter includes a comprehensive knowledge base that documents discoverable vulnerabilities and security issues. When the tool identifies potential problems, it assigns Vulnerability IDs (VIDs) that correspond to detailed explanations and remediation guidance available in the knowledge base. The tool can be executed as Python code for users who prefer to run it directly from source. Results include detailed information about identified security weaknesses, allowing security teams to prioritize remediation efforts based on the severity and impact of discovered issues. kube-hunter is specifically designed for authorized security testing and should only be used on Kubernetes clusters that the user owns or has explicit permission to test.