Node.js DeploymentLesson 81Free preview

Node Security

This lesson is part of Node.js · All levels

Summary

This lesson discusses the security practices of applications: from dependencies, input validation, to header and credential protection. You'll understand common threats like SQL/NoSQL injections, XSS, and data leakage by mistake. The application of defense-in-depth makes the application much harder to penetrate. (Node.js)

Key points

Update the routine dependency and run an npm audit to patch the gap.
Validate all inputs (e.g. with zod/joi) and use parameterized queries to prevent injection.
Avoid evaluating dynamic code (eval) with unreliable data.
Limit the payload body, activate the helmet for the security header, and use strict CORS.
Keep confidentiality in the environment variable; do not commit tokens or API keys.

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