v0 is great for shipping a UI fast, but generated apps routinely leak secrets through NEXT_PUBLIC_ variables and ship open database rules. Catch it before launch.
Runs in your browser · your code never uploads · results in seconds
Hardcoded API keys, tokens, and passwords in the code
Databases left wide open (Firebase / Supabase rules)
A .env file that isn’t protected from upload
Secrets shipped to the browser, SQL injection, and open CORS