A curious user is reading their last invoice from your store. The URL says /invoice/4821. On a hunch, they change it to /invoice/4822. The page loads. It is not their invoice. It is the next customer's: name, address, items, total. They try 4823. Same thing. They take a screenshot and post it. By the time you see it, the post has 2,000 shares and three of your customers have emailed asking to delete their accounts. This is BOLA, the same class of bug that took Lovable, a $6.6 billion platform with 8 million users, 48 days to address in 2026. If a company that size can let it sit, the apps built on top of these platforms get even less attention.
What this looks like in a real app
The bug above has a polite name: IDOR (Insecure Direct Object Reference) or BOLA (Broken Object Level Authorization). The simple version is: your app trusts the ID in the URL or in the API call and forgets to check if the user asking is the user who owns the data. AI tools build apps this way by default, because when you describe the feature you describe what the user can do, not what they must not do. Wherever you have an ID in a URL or in a request body (an invoice, a message, a profile, a shared document), the same gap can be present.
What happened
In 2026, security researchers reported three documented security incidents at Lovable, the AI app-building platform valued at $6.6 billion and used by roughly 8 million people. The most recent one was a BOLA vulnerability (Broken Object Level Authorization) that exposed source code, database credentials, and thousands of user records. The company received the bug bounty report, closed it without escalating, and the issue stayed open for 48 days before being addressed publicly. Source: https://thenextweb.com/news/lovable-vibe-coding-security-crisis-exposed
- Three documented security incidents at a single vibe-coding platform in 2026
- Most recent issue: BOLA, allowing users to access other users' data
- Source code, database credentials, and thousands of user records exposed
- Bug bounty report closed without escalation; vulnerability open for 48 days
Platform providers like Lovable and Replit explicitly say users are responsible for their own privacy settings. The platform is not your security team.
What the law says when one customer reads another's invoice
An invoice is personal data under both GDPR and KVKK. Under GDPR Article 83, this kind of breach can trigger administrative fines up to 20 million euros or 4% of global annual revenue, whichever is higher. Under Turkey's KVKK (Law 6698), fines reach into the millions of Turkish lira and the data controller is named in the public decision. The 72-hour breach-notification clock under GDPR Article 33 starts when you become aware. CCPA, LGPD, and DPDP Act add their own per-record exposure. This is general information, not legal advice. Talk to a lawyer for your situation.
If you ship an app that handles invoices, addresses, or order history, you are a 'data controller' under GDPR. That is true even if you used Lovable, Cursor, or any other AI tool to build it.
What this means if you built on a vibe-coding platform
Two things. First, the platform itself can have issues that affect your app even if your own code is fine. Second, and more important, the apps people build on these platforms inherit the same blind spots. The vibe-coding tools are excellent at making apps that look and work right. They are not designed to refuse insecure patterns, and they will happily ship an app where one user can read another user's data.
What you can do this week
There is a short list of things to check on any vibe-coded app before you let real customers use it. We help our clients work through this list in a focused 1 to 4 week sprint, paid safely through Upwork.
- Authorization checks: can user A read user B's data? Most AI tools miss this by default
- Secrets handling: are API keys committed to your code or shown in browser?
- Rate limiting: can someone hit your endpoints 1000 times per second and crash you?
- Error monitoring: would you find out within minutes if something broke, or weeks?
- Backup strategy: if you lost your database tomorrow, how much data would you lose?
Why we can do this for you
We are featured by Strapi for our open-source work on @ibrahim-bayer/strapi-http-toolkit, listed at https://strapi.io/integrations/strapi-http-toolkit. We have shipped multiple mobile apps to production (see https://kendinbak.ibgroup.dev and https://navigasyon.ibgroup.dev), and we run Lean Cart at https://leancart.global. We use the same AI tools we are auditing, so we know exactly where they cut corners. We work through Upwork escrow with only 10% upfront, so if we miss the mark you do not pay for it.
The Lovable incident is a free lesson. Take it.
Nobody had to suffer for you to learn this one. Treat your AI-built app like any other production system: it needs the same security checks, monitoring, and backups. Most vibe-coded apps can be hardened in a week or two. The cost is small. The cost of finding out the hard way is not.
Get a free written code review of your AI-built app. We will tell you the exact list of issues we found and what fixing them would cost.