security-and-hardening

To prevent SQL injection, enforce boundary validation at system boundaries and use parameterized database queries. This ensures untrusted user input is sanitized and treated strictly as data, blocking malicious command execution.

The best way to harden authentication is to implement strong password hashing, set secure httpOnly cookies, and apply rate limiting to auth endpoints. Regularly check for broken access controls to prevent session hijacking and unauthorized access.

Configure security headers by adding Content-Security-Policy (CSP) and HTTP Strict Transport Security (HSTS) to your web application responses. These headers enforce secure connections and restrict resource loading, mitigating cross-site scripting and downgrade attacks.

Yes, you can secure a REST API handling file uploads and payments by applying strict input validation, CORS restrictions, secure response headers, and rate limits. Additionally, triage dependencies with npm audit to address underlying vulnerabilities.

Output encoding prevents cross-site scripting by neutralizing untrusted data before rendering, while CORS restrictions limit external domain access to your resources. Together they secure third-party integrations against data exfiltration and malicious script execution.