- Lovable apps usually keep their data in a database, and the biggest risk is a table with no rules about who can read it.
- Keys that start with VITE_ are sent to every visitor. Only public values belong there.
- Lovable has its own security scans. A second, independent check is cheap and often worth it before you share the link.
- The quick check needs only your address. The full check reads your GitHub repository, read-only.
What Lovable is and how its apps are deployed
Lovable is a hosted app builder. You describe an app in chat and it builds it. Lovable describes itself as a full-stack platform for building, iterating on and deploying web applications. When you publish, Lovable hosts the app for you at an address like yourproject.lovable.app, and paid plans can use a custom domain. By default, the data lives in Lovable’s built-in backend (called Lovable Cloud), which includes a database, sign-in, edge functions, secrets and file storage and is built on Supabase’s open-source foundation. You can also connect a Supabase project you own. Lovable can sync your project to GitHub in both directions, and it creates a new repository when you set that up.
Common security issues in Lovable apps
These are patterns that are common in AI-built apps, not claims about any one app. The rating is what LetMeCheck would typically give the issue (Critical, High or Medium).
- CRITICALCHECK: WHO CAN READ AND CHANGE EACH DATABASE TABLE
1. Database tables with no access rules
What it is: A database table holds your data, such as users, orders or messages. Row level security (RLS) is the setting that says who may read or change each row. With no rules, the table can be open to anyone who has your public key, and that key is in your site by design.
Why it happens here: Lovable’s own docs say missing RLS policies are the most common way app data gets exposed, and that it sets up basic policies for you but you should review them early. Tables added later, or by a quick prompt, are the easy ones to miss.
How bad it can get: Anyone can download customer names, emails or messages without logging in. This is the most serious issue on the list.
- HIGHCHECK: WHO CAN READ AND CHANGE EACH DATABASE TABLE
2. Rules that exist but let everyone in
What it is: A rule can be switched on and still be too loose. A rule that says “allow if true” checks nothing.
Why it happens here: AI tools often write the shortest rule that makes the app work, and a loose rule is the shortest one. Nothing breaks, so you never notice.
How bad it can get: The table looks protected but behaves as if it is open. Read access to private rows, and sometimes write access, is possible.
- CRITICALCHECK: SECRET KEYS SAVED IN CODE
3. A secret key placed in front-end code
What it is: A secret key is a password for a paid service or for your database. If it sits in code the browser downloads, it is an exposed API key. Anyone can copy it from the page.
Why it happens here: On Lovable, values whose names start with VITE_ are built into the files every visitor downloads. Lovable’s docs say that is fine for public values such as the publishable key, and that secrets belong in its Secrets manager, which is for backend values only. A prompt that says “just add my API key” can put it in the wrong place.
How bad it can get: Someone can use your key to run up your bill. A Supabase service role key is worse, because it skips every database rule.
- HIGHCHECK: PAGES AND ROUTES THAT SKIP THE LOGIN CHECK
4. The front end decides who can see what
What it is: The app hides a button or a page from non-admins, but the data behind it is still reachable if someone asks for it directly.
Why it happens here: Apps are often built screen by screen. The screen checks your role, but the database or the function behind it never does. Lovable’s docs warn that code in the browser cannot be trusted to enforce anything.
How bad it can get: A curious user can read or change other people’s data, or reach admin actions, by skipping the screen.
- HIGHCHECK: PAGES AND ROUTES THAT SKIP THE LOGIN CHECK
5. Edge functions that never check who is calling
What it is: An edge function is a small piece of server code your app calls. If it does not check the signed-in user, anyone who finds its address can call it.
Why it happens here: Edge functions are where Lovable apps talk to paid services or do admin jobs. They are quick to generate, and a quick prompt rarely asks for an authorization check.
How bad it can get: Strangers can trigger actions you pay for, or read data the function fetches with elevated rights.
- MEDIUMCHECK: PACKAGES WITH KNOWN SECURITY HOLES
6. Packages with known security holes
What it is: Your app is built on many open-source packages. Some versions have publicly known holes.
Why it happens here: The AI tool picks versions when it installs packages, and nobody revisits them later.
How bad it can get: Usually a smaller risk than open tables, but a known hole is easy for others to look up.
How LetMeCheck checks a Lovable app
Quick check: give it your published address (the .lovable.app one or your custom domain). It looks at the live site from the outside, the way an attacker would, and can flag things any visitor can see, such as a secret key sitting in the page code. It is free, read-only and needs no sign-up.
Full check: this needs your code. Connect your Lovable project to GitHub first, then connect GitHub to LetMeCheck with read-only access and pick the repository. It reads the repository to find secret keys saved in code (including ones deleted since but still in the history), who can read and change each database table, packages with known holes, and routes that skip the login check. One thing is expected on Lovable: a committed .env file holding your public URL and publishable key is normal, so a real finding is a service role key or any other secret.
Each issue comes with a fix prompt written for Lovable. You paste it into the Lovable chat, review what changes, and then run the check again to confirm the issue is gone.
The quick check is free, needs no sign-up and is read-only. See pricing for what the paid plans add, or try the free website audit now.
Example report entry
EXAMPLE, NOT A REAL CUSTOMER RESULT
Anyone can read your users table
The table named profiles has no row level security rules. Names and emails can be downloaded without logging in. This is a made-up example to show the format of a report entry.
In my Lovable project, the profiles table has no row level security. Turn it on, add a rule so each signed-in user can only read and change their own row, and change nothing else. Show me the change before you apply it.
5 steps to harden a Lovable app before launch
- 1Run Lovable’s own Deep scan before you publish, then run a LetMeCheck quick check on the published address as an independent second look.
- 2Turn on row level security for every table, then test it: open the app signed out, and then as a second user, and try to read the first user’s data.
- 3Keep only public values in VITE_ variables. Move every real secret into the Secrets manager, and never put a service role key in the front end.
- 4Open each edge function and confirm it checks who is calling before it does anything.
- 5Connect GitHub, run the full check, fix what it finds, and run it again. Set the published app to Invite only if it is not ready for the public.
When to get a developer
If your database rules are tangled, or you handle payments or health data, a person is worth having. A vetted developer who knows Lovable can read your report, fix the open tables and edge functions, and give you a fixed quote before work starts. LetMeCheck re-checks afterwards. See hire a developer.
Frequently asked questions
Is Lovable safe?
Lovable gives you tools, including its own security scans, but whether a given app is safe depends on how it was built and set up. Open database tables and keys in the front end are common in AI-built apps. A check tells you which of them apply to yours.
Do I need row level security on a Lovable app?
If your app stores user data in a database, yes. Lovable’s docs say missing RLS policies are the most common way app data gets exposed. Row level security decides who can read and change each row.
Is it normal to have a .env file in my Lovable repository?
Yes, for public values. Lovable’s docs say the .env file holds your backend URL and publishable key and should not be ignored. A real secret, such as a service role key, should never be in it.
Can LetMeCheck check a Lovable app without my code?
Yes. The quick check works from your published address alone and needs no sign-up. Connect GitHub for the full check, which reads your code.
How is this different from Lovable’s own security scan?
Lovable’s scans run inside Lovable. LetMeCheck is a separate, outside check you can run on your live site or your GitHub repository, with plain-English fix prompts. Using both gives you two views.
Check your Lovable app now
Run the quick check on your live site in about a minute, with no sign-up. Connect GitHub (read-only) when you want the full check.
Other platforms
Sources
- Lovable docs: Welcome (checked 2026-11-03)
- Lovable docs: Deploy and publish (checked 2026-11-03)
- Lovable docs: Secrets (checked 2026-11-03)
- Lovable docs: Avoiding security pitfalls (checked 2026-11-03)
- Lovable docs: Security (checked 2026-11-03)
- Lovable docs: Cloud (checked 2026-11-03)
- Lovable docs: Supabase integration (checked 2026-11-03)
- Lovable docs: GitHub integration (checked 2026-11-03)
- Lovable docs: Git sync overview (checked 2026-11-03)
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