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Finding

The Firebase database answers without a sign in

A plain request to {endpoint} returned data with no sign in, so the rules on that database let anonymous readers in.

Last updated September 20, 2026

Before launch · Needs a developer

Why AI-built apps get this

Firebase ships with open rules while you build, and the console says so. Turning them into real rules is a separate task with no deadline attached, and the app behaves identically either way.

What it affects

A plain request to {endpoint} returned data with no sign in, so the rules on that database let anonymous readers in.

What the evidence line looks like

GET https://example-app.firebaseio.com/.json returned 200 with data

Every finding on a result carries a line like this one: the request that was made and the answer that came back. You can run the same request yourself and get the same answer, which is the point.

The fix

Replace the open rules with rules that require an authenticated caller and scope each path to its owner.

Prompt for your coding agent

Rewrite the Firebase database rules so no path is readable or writable without an authenticated caller scoped to the owner.

A result gives you this prompt written for your builder, in its own dialect, and a batch prompt that carries every fix at once.

Incidents that involved this

  • Not verified

    First-quarter 2026 assessment of 200 apps

    183 of 200 vibe-coded apps, 91.5 percent, contained at least one vulnerability traceable to AI hallucination or missing security context.

  • Observed

    Moltbook records exposure

    An app exposed 4.75 million records, including 1.5 million API tokens and 35,000 email addresses.

  • Not verified

    Tea app, first breach

    An unprotected storage instance exposed tens of thousands of user images, including identity documents.

  • Not verified

    Tea app, second breach

    Three days after the first breach, over a million private messages were exposed through an API endpoint with no access control.

  • Observed

    Lovable-built apps, CVE-2025-48757

    Broken access control reported across 170 production applications built with Lovable.

Related terms

Run the free Launch Risk Check on your app

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Last updated September 20, 2026