Security Issues in Devin Code

Devin makes security decisions autonomously — choosing auth strategies, setting permissions, configuring access controls. These decisions may be technically functional but inadequate for production. Devin may also install packages with known vulnerabilities if they solve an immediate problem

Review every security-related decision Devin made: auth strategy, access controls, data validation, session management. Run npm audit or pip audit to check for vulnerable dependencies. Test auth flows for bypass possibilities. Verify data access is properly scoped

Every Devin 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 Devin 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.