Is v0 by Vercel Safe?
v0 is safe for what it's designed for · generating React UI. Risk shows up when you extend beyond that into API routes and auth without review. Vercel's platform posture is strong, but generated app logic still needs scrutiny.
Known risks
- Missing auth on API routes · AI-generated Next.js route handlers may skip session checks, exposing data or admin actions to unauthenticated callers.
- Client-side environment variables · Any `NEXT_PUBLIC_` prefixed variable ships in the browser bundle · easy to accidentally leak keys.
- Unsanitized dynamic content · v0 UI generations occasionally use `dangerouslySetInnerHTML` with untrusted input.
How to make it safer
- Guard every route handler · Wrap `app/api/*` handlers with a session check or middleware · reject unauthenticated calls early.
- Audit `NEXT_PUBLIC_` vars · Only truly public identifiers belong there. Everything else stays unprefixed and server-side.
- Scan the deployed app · SimplyScan validates headers, auth, and secret exposure on your v0-built site.
Frequently asked
Is v0 safe for real apps?
Yes, as long as the API routes and auth boundaries are reviewed. The generated UI itself is fine.
Does v0 leak secrets?
Only if you put them in `NEXT_PUBLIC_` vars. Keep sensitive keys unprefixed and server-side.
How does v0 compare to Lovable/Bolt?
v0 is more focused on UI generation. Backend risk is smaller but not zero.
Scan your v0 by Vercel app →