The short version
Most apps built with Lovable, Bolt, v0, or Cursor ship with security holes. A 2026 review of more than 200 vibe-coded apps found 91.5% carried at least one vulnerability. The three that bite first are exposed API keys, Row-Level Security left off, and broken auth. You can check several yourself in an afternoon. A few need a senior engineer. This is the exact checklist we run before we call an AI-built app safe to launch.
You shipped fast. The AI builder turned your idea into a working app over a weekend, the demo went well, and now real users are signing up. Then a quiet thought shows up at 2am. Is this thing actually safe? Could someone read another customer's data? You are right to ask.
Here is the uncomfortable part. The speed that makes AI builders feel like magic is the same speed that skips the boring security work a careful engineer would never skip. The builder writes code that runs. It does not write code that defends itself.
Is vibe coding actually insecure?
Yes, more often than not, and the numbers are not subtle. Depending on the study, between 40% and 62% of AI-generated code contains a security vulnerability. A first-quarter 2026 review of more than 200 vibe-coded applications found 91.5% carried at least one flaw traceable to an AI hallucination (Autonoma).
This is not theory. In January, the vibe-coded app Moltbook was breached three days after launch, exposing 1.5 million API tokens and 35,000 email addresses through a Supabase database with no row-level security (TechGines). A separate scan found roughly 380,000 publicly reachable vibe-coded apps, and more than 2,000 of the corporate ones were leaking sensitive data to the open internet. Your app does not have to be famous to be found. Scanners look for everyone.
What are the most common vibe-coding security holes?
The same gaps show up again and again. Here is the checklist we run on every Lovable, Bolt, v0, Cursor, or Replit app, in the order that matters.
- Exposed API keys. Open your live site, press F12, and search the bundle for your keys. If your Supabase service key or a payment secret is sitting in the browser, anyone else can read it too. Move every secret to the server.
- Row-Level Security turned off. Around 70% of Lovable apps ship with RLS disabled, so the database trusts the browser and any logged-in user can read any row. Turn it on for every table that holds user data, then try to break it from a second account.
- Broken authentication. In one review, 24% of vibe-coded apps had their auth logic inverted, so unauthenticated visitors had full access while real users were locked out. Verify signups, expire sessions, and check the user on the server.
- Wide-open CORS. Prototypes often allow every origin. Lock it down to your own domains so random sites cannot make authenticated calls on your users' behalf.
- No input validation. AI builders trust whatever the form sends. Validate and sanitize every input on the server to shut down injection and junk data.
- No rate limiting. Without a cap, one script can hit your signup or payment endpoint thousands of times a minute and run up a real bill. Cap the endpoints that cost money or send mail.
- Secrets in the repo. Hardcoded database strings and tokens leak into commit history and client bundles. Rotate anything exposed and load secrets from the environment.
- Unpatched dependencies. Generated apps pull in packages and almost never update them. Run an audit and patch the known holes before launch.
- No logging or alerts. If you cannot see a failed-login spike or an error storm, you learn about a breach from your users. Add basic error and access logging from day one.
How do you check if your app is already leaking data?
Three checks take about an hour and tell you most of what you need to know.
Open the live site in your browser, go to the Sources tab, and search for words like "service", "secret", and "key". Anything that looks like a credential in the browser is already public. Next, log in with a normal test account, create a second account, and try to load the first account's data by changing an id in a request. If account two can see account one's records, your RLS is off or wrong. Finally, log out completely and try to open a page that should require login. If it loads, your auth is not being checked on the server.
None of these need a security background. They need ten minutes and the willingness to look.
Which AI builders have these problems?
All of them, because the gap is in the pattern, not one product. Lovable, one of the largest vibe-coding platforms with millions of users, has had three documented security incidents, including a flaw left open for 48 days (The Next Web). Bolt and v0 generate clean frontends but lean on you to wire the backend security. Cursor and Replit hand you more control, which also means more rope. The fix is the same across all of them. Add the guardrails the builder skipped.
Can you fix it yourself, or do you need an engineer?
Some of it is genuinely DIY. The rest is where a quiet mistake becomes a public headline. Here is the honest split.
| Fix yourself in an afternoon | Get a senior engineer |
|---|---|
| Search the bundle for leaked keys | Move secrets server-side and reroute the calls |
| Lock CORS to your domains | Write and test Row-Level Security policies |
| Turn on email verification | Harden sessions and server-side auth checks |
| Add basic error logging | Validate inputs and add rate limiting properly |
If the security items make you nervous, that instinct is correct. Data isolation and auth are the two places where getting it wrong stays invisible until it is public.
How Geminate Solutions handles this
We do this for a living at Geminate Solutions. We take apps built on Lovable, Bolt, v0, Cursor, and Replit and make them safe to put real users and real money through. You keep your codebase, you own everything we write, and you get a plain list of what was broken and how we fixed it. We have shipped 50+ products and hold a 4.9 rating across 24+ client projects, so this is the work, not a theory.
If you want a second set of eyes, we run a free 48-hour production-readiness audit. Send us your app URL and a senior engineer comes back with the real fix list, no pitch attached. You can read how we take AI-builder apps to production, follow the deeper Lovable production checklist, or just tell us what you built and we will take a look.
Frequently Asked Questions
Is vibe coding secure?
Not by default. The app works, but the common gaps are exposed keys, a database with Row-Level Security turned off, and auth that is never checked on the server. Fix those three first and you close most of the risk.
Are Lovable apps safe to launch as-is?
Usually not without a security pass. Around 70% ship with RLS off, which lets one user read another user's data. Turn it on, test it from a second account, and move every secret off the browser before you go live.
What is the most common AI-app security mistake?
Row-Level Security left off. It is quiet, easy to miss, and it lets any logged-in user read everyone's data. It is the first thing we check on every audit.
