input-sanitization

To prevent SQL injection and XSS, apply allowlist validation for inputs and context-aware encoding for HTML, JavaScript, and SQL contexts. Defense-in-depth strategies across APIs and databases ensure data integrity and system protection.

The best way to validate user input formats like emails and UUIDs is using allowlist patterns. This approach strictly compares input data against expected, safe formats in Python and TypeScript to block unexpected characters.

To sanitize file uploads, validate file types and enforce size limits while sanitizing filenames. This process ensures uploaded files match expected formats and prevents malicious content from entering your system.

Implementing HTTP security headers like CSP and HSTS involves configuring your server to apply essential security headers. This adds a defense-in-depth layer protecting web applications from various injection and execution attacks.

Context-specific encoding works for both JavaScript and HTML output by safely escaping data before display. It ensures injected data is treated as text rather than executable code, mitigating execution vulnerabilities.