What Is v0 by Vercel?
An AI-powered UI generation tool by Vercel that creates React components from natural language descriptions and screenshots. v0 generates shadcn/ui-based components with Tailwind CSS, producing frontend code that can be integrated into Next.js projects.
Security Risks
v0 primarily generates frontend components, limiting but not eliminating security risks:
- XSS through dangerouslySetInnerHTML: Sometimes used for rich content rendering
- Client-side data handling: Generated forms may process sensitive data client-side
- No backend integration: Components lack server-side validation by default
- Hardcoded data: Demo data may persist into production
- Accessibility gaps: Missing ARIA attributes can cause usability issues
- State management leaks: Sensitive data stored in client-side state without encryption
Security Checklist
- Review all generated components for dangerouslySetInnerHTML usage
- Ensure form submissions use server actions or API routes, not client-side logic
- Validate all user inputs server-side, not just with client-side checks
- Remove placeholder/demo data from generated components
- Check that sensitive data is not stored in localStorage or client-side state
- Verify component props do not expose sensitive information
- Add CSRF protection to all form submissions
- Ensure generated components are accessible (ARIA, keyboard navigation)
- Review third-party component dependencies for vulnerabilities
- Test components with malicious input data
Frequently Asked Questions
Is v0 generated code safe to use?
v0 generates frontend components that are generally safe for UI display. Security risks arise when these components handle user input, authentication, or sensitive data without proper backend integration. Always add server-side validation and security logic to v0 components.
Does v0 generate secure forms?
v0 generates visually polished forms but they typically lack security features: no CSRF tokens, no server-side validation, no rate limiting, and no sanitization. Add these security layers when integrating v0 components into your application.
How do I securely integrate v0 components?
Use v0 for UI generation, then add security layers: server actions for form handling, middleware for authentication, server-side validation for all inputs, and proper error handling. v0 components are the UI layer – security logic belongs in the backend.