JavaScript (Node.js) Application Security

Modern web development with Node.js requires not only performance and scalability, but also impeccable security. This book is a practical guide that will help you build reliable protection for server-side JavaScript applications, starting from basic principles and ending with advanced techniques for detecting and preventing attacks.

Who is this book for? The book is intended for Node.js developers (from junior to senior), DevOps engineers, security auditors, and anyone responsible for web application security. Basic knowledge of JavaScript and experience with Node.js are assumed, but all security concepts are explained from scratch.

What will you learn? You will learn to identify and eliminate the most dangerous web application vulnerabilities, including:

• Protection against Cross-Site Scripting (XSS) and SQL injections in the Node.js environment
• Preventing Server-Side Request Forgery (SSRF) and Remote Code Execution (RCE) attacks
• Secure handling of authentication and sessions (JWT, OAuth2, cookies)
• Protecting REST API and GraphQL endpoints from unauthorized access
• Dependency management and npm package auditing
• Configuring HTTPS, HSTS, CSP, and other security HTTP headers
• Secure work with databases (MongoDB, PostgreSQL) and Redis

Practical focus. Each chapter contains real code examples, ready-to-use snippets, and step-by-step instructions for setting up protection. You will learn how to use tools such as Helmet, express-rate-limit, bcrypt, jsonwebtoken, as well as how to conduct automated security audits using npm audit and Snyk.

Special attention is given to: microservice architecture security, protection against DoS attacks, secure logging and monitoring, as well as proper configuration of CI/CD pipelines with security checks. The book aligns with OWASP recommendations for Node.js and covers current CVE vulnerabilities.

After reading this book, you will be able to create truly secure Node.js applications ready for production deployment, and confidently pass security audits.