IS V0.DEV SAFE?

v0-generated components may use dangerouslySetInnerHTML or render unsanitized user input directly into the DOM. AI models optimize for functionality and appearance, not security, so generated code frequently lacks output encoding and input sanitization.

Forms generated by v0 typically include client-side validation only, using HTML5 attributes or JavaScript checks. Without corresponding server-side validation, attackers can bypass all input constraints by sending requests directly to the API.

v0-generated forms and API interactions do not include CSRF tokens or SameSite cookie configurations. This leaves form submissions vulnerable to cross-site request forgery attacks where malicious sites can trigger actions on behalf of authenticated users.

Generated components often include fetch calls to API endpoints without any authentication headers or token management. These endpoints may be deployed as-is, creating unauthenticated API routes that anyone can access.

v0 generates validation logic that runs entirely in the browser, including email format checks, required field validation, and data type enforcement. All of these can be trivially bypassed with browser dev tools or direct API requests, offering zero actual security.

Is v0.dev generated code secure?

v0.dev generates visually correct and functional code, but it does not prioritize security. Generated components typically lack server-side validation, CSRF protection, and proper input sanitization. You should treat v0 output as a starting point that requires a security review. UNPWNED checks externally observable header, exposure, endpoint, dependency, CORS, form, rate-limit, and error-disclosure signals. Server-side validation, CSRF, and sanitization require direct review.

Can v0.dev components be exploited?

Yes, v0-generated components can contain XSS vulnerabilities, unprotected API calls, and client-side only validation that attackers can bypass. The AI focuses on making components work and look correct, not on defending against malicious input. UNPWNED checks externally observable XSS-relevant browser controls, public-endpoint, form, and error-disclosure signals. Reflected-XSS probes are not enabled in the current production profile, and stored XSS and server-side validation require targeted testing or code review.

How do I secure a v0.dev project before deploying?

Review all generated forms for server-side validation, add CSRF tokens to state-changing requests, sanitize user inputs, and add authentication to API routes. You should also configure security headers in your Next.js middleware. Run an UNPWNED scan after deployment for bounded outside-in header, endpoint, form, CORS, rate-limit, and error-disclosure signals. It does not prove that internal controls are complete.

Does v0.dev handle authentication and authorization?

v0.dev does not generate authentication or authorization logic. It creates UI components that may reference API endpoints but leaves auth implementation entirely to you. Without adding proper auth, your API routes are publicly accessible. UNPWNED checks common public API paths for reachability, exposed response data, rate-limit, CORS, and error-disclosure signals. Authentication and object-level authorization require API-specific testing or code review.

Should I use v0.dev code in production as-is?

No. v0 output should be reviewed and hardened before production deployment. Add server-side validation, security headers, authentication, and input sanitization at minimum. The generated code is a scaffold, not a finished product. Use UNPWNED for a bounded outside-in assessment of the deployed application; validation, authentication, sanitization, and business logic require direct review.