AI app builders like Lovable, Bolt, and v0 are impressive. You describe what you want, wait a few minutes, and get a working app that looks ready for real users.

It is not ready for real users.

I'm Alon Trifonov, founder of Zyntari, a small engineering studio in Israel. A big part of my job is taking AI-generated prototypes and turning them into production software, mostly Python and Flask on the backend. After auditing a bunch of these apps, I keep finding the same five security holes. Not exotic, movie-hacker stuff. The boring classics: the kind that show up in the OWASP Top 10 year after year because developers keep making the same mistakes. Now AI generators are making those same mistakes at scale.

Every one of them is fixable in under an hour. Here is what to look for, how to check if your app has the problem, and exactly how to fix it.

1. Debug mode left on

Open the main file of your generated app.…