v0.dev Security Checklist
Last updated: January 12, 2026
Use this checklist to ensure your v0.dev application is secure before launch. 5 critical items require immediate attention.
Why This Security Checklist Matters
Security checklists serve as systematic guides for identifying vulnerabilities that might otherwise be overlooked during rapid development cycles. For v0.dev applications specifically, this checklist addresses the most common security gaps that emerge when using AI-assisted development workflows.
Research from multiple security organizations indicates that approximately 80% of AI-built applications contain at least one exploitable vulnerability at launch. The vulnerabilities are often predictable—they follow patterns that this checklist is designed to catch. By systematically reviewing each item, you significantly reduce the risk of launching an insecure application.
Unlike generic security checklists, this guide focuses specifically on vulnerabilities prevalent in v0.dev applications. Each item has been prioritized based on real-world attack patterns and the potential impact of exploitation. Critical items should be addressed before any production deployment.
Critical Priority
Critical items can lead to complete application compromise, data breaches, or unauthorized access to all user accounts. These must be addressed before deploying to production. Attackers actively scan for these vulnerabilities.
High Priority
High priority items represent significant security risks that could allow unauthorized access to sensitive data or functionality. While not immediately catastrophic, these vulnerabilities should be fixed as soon as possible.
Medium/Low Priority
Medium and low priority items strengthen your overall security posture. While they may not be immediately exploitable, addressing them prevents attack chains and defense-in-depth gaps.
Manual vs Automated Security Checking
While manual security reviews are thorough, they're time-consuming and prone to human error. Automated scanning catches common vulnerabilities instantly, freeing you to focus on business logic and complex security decisions.
Items VAS Automates
- Exposed API keys and secrets in JavaScript bundles
- HTTP security header configuration
- Supabase RLS policy testing
- Firebase Security Rules validation
- Cookie security attributes
Manual Review Still Required
- Business logic vulnerabilities
- Custom authentication implementations
- Access control logic in API routes
- Data validation requirements
- Third-party integration security
Component Integration Security
Review generated component code before using
v0 generates UI components - review for XSS and other client-side vulnerabilities
Validate props and data handling
Ensure components properly validate and sanitize input data
Check for dangerouslySetInnerHTML usage
AI may generate code using dangerous React patterns - review carefully
Review event handlers for security
Check onClick and other handlers for proper input handling
Data Fetching Security
Verify authentication in data fetching
Ensure components check auth before fetching sensitive data
Don't expose API keys in components
AutoClient-side components shouldn't contain API keys or secrets
Implement proper error handling
Don't leak sensitive information in error messages
Use server-side data fetching for sensitive data
Keep sensitive data fetching on the server, not in client components
Form Security
Add CSRF protection to forms
Generated forms may lack CSRF tokens - add them when integrating
Implement proper input validation
Don't rely on client-side validation alone - validate server-side too
Use proper input types
Use type='password', type='email' etc. for appropriate inputs
Disable autocomplete for sensitive fields
Use autocomplete='off' for sensitive input fields
Integration with Backend
Secure API endpoints used by components
Components are only as secure as the APIs they call - secure your backend
Implement proper CORS configuration
AutoConfigure CORS correctly for your component's API calls
Use HTTPS for all API calls
AutoEnsure components only make secure API requests
Handle authentication tokens securely
AutoDon't store tokens in localStorage - use secure cookies
Don't Check Manually
VAS automatically checks 4 of these 16 items. Get instant results with detailed remediation guidance.
Run Automated Security ScanFrequently Asked Questions
What's the difference between critical and high priority items?
Critical items represent immediate security risks that could lead to data breach if not addressed - like missing database access controls or exposed secrets. High priority items are important but typically require an additional vulnerability to exploit.
Can I skip low priority items?
Low priority items provide defense-in-depth but aren't immediate risks. Address all critical and high items before launch. Low items can be added post-launch, but shouldn't be ignored entirely - they protect against edge cases and future vulnerabilities.
How often should I re-run this checklist?
Re-run after major feature additions, authentication changes, or new database tables. Set up automated scanning with VAS to catch regressions. Many teams integrate security scans into their CI/CD pipeline for continuous verification.
What does 'Auto-Scanned' mean on checklist items?
Items marked 'Auto-Scanned' can be automatically verified by VAS. Instead of manually checking each item, run a VAS scan to instantly verify these items against your deployed application. Non-automated items require manual verification.