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Preventing XSS and Injection Attacks

Cross-site scripting (XSS) and injection attacks remain the leading web vulnerabilities affecting React applications in 2026. Unlike backend technologies, React runs untrusted user input directly in the browser—making output escaping and input sanitization critical first lines of defense. This 10-article series teaches you how React's automatic escaping works, when and why to use dangerouslySetInnerHTML safely, how to audit your components for XSS vectors, and how to implement a defense-in-depth security strategy with libraries like DOMPurify and Content Security Policy headers. By the end, you'll build production-grade secure React forms and understand the complete threat landscape of injection attacks in modern frontends.

Articles in this series​

  1. What Is XSS and Why React Prevents It
  2. Understanding React's Built-In HTML Escaping
  3. The Dangers of dangerouslySetInnerHTML in React
  4. Injection Attacks Beyond XSS: SQL and Command Injection
  5. Sanitizing Rich Text With DOMPurify
  6. Preventing Attribute Injection in JSX
  7. Input Validation vs. Output Escaping in React
  8. Security Auditing React Components for XSS Vectors
  9. Content Security Policy for React Applications
  10. Building a Secure React Form With Input Sanitization