Security Issues in Magic.dev Code

Magic.dev changes can be broad and touch security-sensitive code across many files simultaneously. An auth check that's correctly maintained in most files but inadvertently removed in one creates a vulnerability. Broad changes require especially careful security review

Review all security-sensitive code paths in broad Magic.dev changes — auth, authorization, input validation, and data access. Run SAST on the full changeset. Don't rely on file-by-file review for broad changes — verify security invariants hold end-to-end

Every Magic.dev app needs authentication — verifying who the user is — and authorization — verifying what they're allowed to do. Check that every API route and server action verifies the user's identity before processing requests. Check that users can only access their own data. A common Magic.dev pattern is adding auth to the UI but not the API, which means anyone with the endpoint URL can access data directly.

Never trust data coming from the client. Every form submission, URL parameter, and API request body should be validated server-side before processing. Use a schema validation library like Zod to define expected shapes and reject anything that doesn't match. This prevents injection attacks, data corruption, and unexpected crashes.

Configure security headers to protect against common web attacks: Content-Security-Policy to prevent XSS, Strict-Transport-Security to enforce HTTPS, X-Frame-Options to prevent clickjacking, and X-Content-Type-Options to prevent MIME sniffing. Most hosting platforms let you configure these in a headers file or configuration.

If your app handles user data, processes payments, or stores sensitive information, a professional security review is essential before launch. Our security scan ($19) checks for the most critical vulnerabilities, and our full security review service provides a comprehensive assessment with remediation guidance.