Guides / Is my Lovable app secure?

Is my Lovable app secure? A practical check before launch

Updated November 3, 2026

Lovable makes it fast to go from idea to a working app, usually with Supabase handling the database and login. That speed means a few security settings are easy to miss. Here's what to check before you share the link.

1. Turn on Row Level Security for every table

A Lovable frontend talks to Supabase directly from the browser using the project's anon (public) key. That key is meant to be public, so the only thing standing between a visitor and your data is Row Level Security (RLS). If a table has RLS off, anyone with the key can read it, and often write to it.

• In the Supabase dashboard, open Table Editor and look for tables marked as unrestricted or with RLS disabled.
• Turn RLS on for every table in the public schema, then add policies for exactly who may read and write each one.
• See our Supabase RLS checklist for policy patterns.

2. Make sure no secret keys reach the browser

The anon key is fine to ship. These are not: the Supabase service_role key, OpenAI or Anthropic keys, Stripe secret keys (sk_live_), and any other provider's secret. If the AI added one to frontend code to "make it work," it's visible to every visitor.

• Open your live site, press F12, and search the loaded JavaScript (Sources panel, or Ctrl/Cmd+Shift+F) for service_role, sk-, sk_live_.
• Move any call that needs a secret into a Supabase Edge Function and store the key as a function secret.
• If a secret was ever public, rotate it. Removing it from the code isn't enough.

More in Exposed API keys: how to check.

3. Check storage buckets

Supabase Storage buckets can be public or private. Public buckets are right for things like avatars; they're wrong for invoices, uploads or anything personal. Check each bucket's setting and its storage policies.

4. Review authentication settings

• Decide whether sign-ups should be open to anyone, and whether email confirmation is required.
• Set your Site URL and redirect URLs in Supabase Auth to your real domain, not just the preview URL.
• Don't rely on hiding buttons in the UI to restrict admin features. Enforce it in RLS policies or server code.

5. Use Lovable's own checks, then verify from outside

Lovable includes built-in security review features; use them, and fix what they flag. Then test the live site the way a visitor sees it: log out, open a private window, and confirm you can't see other people's data.

6. Add basic security headers

Headers like Content-Security-Policy, Strict-Transport-Security, X-Content-Type-Options and a frame-ancestors or X-Frame-Options rule reduce the damage from common attacks. How you set them depends on where you host; if you publish to a custom host, its config file usually controls them.

Quick summary

1. RLS on, with real policies, for every table.
2. No service_role or other secret keys in frontend code.
3. Private buckets for private files.
4. Auth redirect URLs and sign-up rules set for production.
5. Security headers in place.

More guides: Bolt.new app launch checklist · Supabase RLS checklist · Exposed API keys: how to check · Pre-launch checklist: Cursor, v0, Replit