A Lovable app can ship the same class of security gaps as any fast-generated web app: API keys compiled into the frontend bundle, Supabase row-level security left off by default, missing security headers, and exposed source maps. Lovable is built for speed and works from natural-language prompts, so security hardening — the parts that don't show up as a visible bug during a demo — is easy to skip unless something explicitly checks for it.
Lovable generates full-stack apps from a prompt, commonly wired to a Supabase backend. That combination is fast to ship and easy to iterate on, but a handful of security defaults need explicit attention that a prompt-driven workflow doesn't always surface on its own.
Common issues in Lovable apps
Supabase row-level security (RLS) left disabled
Supabase tables ship with RLS off by default. Without an explicit policy, anyone with your project's anon key — visible in your frontend bundle by design — can read or write rows they shouldn't be able to touch.
Service-role keys used from the client
The Supabase service-role key bypasses RLS entirely and should never leave your server. It's easy to end up with it in a client component if a generated snippet reaches for the "key that works" during iteration.
Missing security headers
Lovable's default hosting doesn't set a Content-Security-Policy, HSTS, or clickjacking protection — these are opt-in, not default.
Public storage buckets
Supabase Storage buckets default to project-level access rules that are easy to leave broader than intended, especially for buckets created quickly during prototyping.