v0.dev Security Best Practices
Secure your v0-generated applications with these essential practices. From code review to deployment security.
Verify your app follows these best practices automatically.
v0 generates UI code quickly, but security requires human attention. These practices help you build secure applications with v0-generated components.
Quick Wins
Security Best Practices
#1Review All Generated Code Before Using
criticalv0 generates functional code that may have security oversights. Review before integrating into your app.
Implementation
Read through generated components, check for XSS vulnerabilities and data handling
#2Add Server-Side Validation
criticalv0 generates client components. Add server-side validation for any data these components submit.
Implementation
Validate all form data server-side before processing or storing
#3Don't Include Real APIs in Prompts
criticalWhen prompting v0, don't include real API keys or endpoints. Use placeholders.
Implementation
Use placeholder values in prompts, add real values via environment variables
#4Implement Proper Authentication
highv0 generates UI, not auth. Use established auth solutions like NextAuth or Clerk.
Implementation
Don't accept v0-generated auth code, use auth libraries
#5Sanitize Dynamic Content
highIf v0 components display user content, ensure proper sanitization.
Implementation
Use React's built-in escaping, avoid dangerouslySetInnerHTML
#6Configure Vercel Security
mediumWhen deploying v0 code to Vercel, configure environment variables and security headers.
Implementation
Follow Vercel security best practices for deployment
Common Mistakes to Avoid
Using v0 components without review
Generated code may have security oversights
Review all v0 code before using in production
Trusting client-side validation only
v0 generates client components, but validation must happen server-side
Add server-side validation for all data handling
Hardcoding API endpoints in components
Exposes internal APIs and makes them harder to change
Use environment variables for API endpoints
Verify Your v0.dev App Security
Following best practices is the first step. Verify your app is actually secure with a comprehensive security scan.
Get Starter ScanFrequently Asked Questions
Is v0-generated code secure?
v0 generates functional React code, but security isn't its focus. Review all generated code, add server-side validation, and use established libraries for authentication.
Can I use v0 for authentication UI?
Yes, v0 can generate auth UI (login forms, etc.), but don't use it for auth logic. Use NextAuth, Clerk, or similar libraries for actual authentication.
How do I deploy v0 code securely?
Export to a proper project, add environment variables for any secrets, implement server-side validation, and follow Vercel security best practices for deployment.
Related v0.dev Security Resources
Similar Platforms
Last updated: January 2026