Securing Node.js Backends Against OWASP Top 10

Node.js is incredibly powerful, but its vast package ecosystem can be a security nightmare. Adhering to the OWASP Top 10 guidelines is non-negotiable for any production application.

Broken Access Control

Never trust the client. If an endpoint receives a User ID in the payload, verify against the JWT token that the logged-in user actually has permissions to modify that User ID. For advanced setups, review DevSecOps in CI/CD.

Injection Attacks

SQL Injection is not dead. It just looks different in NoSQL databases. Always sanitize inputs, use parameterized queries, and avoid directly passing client objects to ORM methods like `find()` in Mongoose or Prisma.

Conclusion

Implementing security middleware like Helmet, rate limiters, and strict input validation layers (e.g., Zod or Joi) drastically reduces your attack surface.