Joi Security is a command-line interface tool designed for security assessment of Joi validator library schemas. The tool performs both offensive and defensive security evaluations to test whether Joi validation schemas can withstand various security attacks. The CLI tool can be installed globally via NPM and operates by scanning JavaScript files containing Joi schemas. Users create sample JavaScript files with their Joi validation schemas and execute security scans using the joi-security scan command. The tool includes comprehensive attack simulation capabilities covering multiple attack vectors: - Cross-site scripting (XSS) attacks - SQL injection attempts - NoSQL injection testing - Remote code execution (RCE) scenarios - Local file inclusion (LFI) attacks - Buffer overflow testing - Server-side request forgery (SSRF) attempts - Suspicious IP address detection - Homograph attacks targeting domains and email addresses The primary objective is to identify potential security vulnerabilities in Joi validation schemas before they can be exploited in production environments. The tool helps developers ensure their input validation logic is robust against common web application security threats.