Bolt built it and its scan catches two of the big risks — but four checks are still yours before you share the link, so nobody can read each other's data or run up your AI bill.
If you prompted Bolt into a working app, the hard creative part is done. This isn't about Bolt being unsafe — it ships a security scan that already looks for two of the big ones. Its docs say "Bolt checks that private keys and passwords aren't stored in your project's code or sent to visitors' browsers." and that "Bolt looks for ways one person could see, change, or delete information that isn't theirs." That second line is the whole ballgame: who can reach whose data. Your app stores data either in a Bolt database or, in Bolt's words, you can "create a Bolt database or connect your own Supabase database." Here are six things to confirm before you share the link, with where each lives in Bolt. Tool facts were read on Bolt's own docs on 26 Sep 2026.
Bolt's scan catches two of these; the rest are yours to confirm. · Illustration made in Higgsfield with the GPT Image model
One person can't see, change or delete another person's data — run and read Bolt's scan
No secret key is in anything that runs in the browser — Bolt's scan flags this
Keys live in environment variables, not hardcoded in the project
There's a limit on how fast one account can sign up or call your AI features
You know how your database is backed up and how you'd restore it
You've reviewed what Bolt built, not trusted the first version
1. Make sure people can't reach each other's data
This is the one behind the biggest vibe-coded exposures: a database that lets anyone read or edit rows that aren't theirs. Bolt's security page describes its scan looking for exactly that: "Bolt looks for ways one person could see, change, or delete information that isn't theirs." On a Supabase-backed app, the setting that enforces it is Row Level Security (RLS): a rule on each table for which rows each person may see. The check is to run Bolt's scan, read what it flags, and confirm every table has a policy — Bolt's own advice is to do this before launch: "we recommend running a security check at least once before you publish." Where to look: your database view in Bolt, or the Supabase dashboard if you connected your own. The concept is in Row Level Security explained, a correct policy is in write the RLS policy for my users table, and the real-world version is the Moltbook exposure.
2. Keep secret keys out of the browser
Anything your app sends to the browser, anyone can read. Bolt's scan helps here — its docs say "Bolt checks that private keys and passwords aren't stored in your project's code or sent to visitors' browsers." The dangerous key to watch is the Supabase secret (service-role) key, which bypasses RLS: it belongs only on the server, never in front-end code. So run the scan, and if it flags a key in client code, move it. The view-source reality is in your API keys are in the browser.
3. Put keys in environment variables, not in the code
Bolt's docs describe connecting a database by putting values like the Supabase service-role key into environment variables, which your app reads at runtime — so the secret isn't sitting in your source. Two practical rules: don't hardcode a key into a file to "make it work," and, because Bolt's docs describe environment variables as "values that change depending on where the app is deployed," when you publish, confirm they're set where the app is hosted rather than assume they travelled with the code. What environment variables and .env files are is in environment variables and secrets, explained.
4. Put a limit on sign-ups and AI calls
A rate limit caps how often one person or script can do something; without it, a single loop can create thousands of accounts or burn your AI budget in a night. Bolt's docs don't advertise a built-in per-endpoint rate limit, so treat this as "check your project": ask Bolt where sign-up and any paid-AI endpoint are limited, and what happens if one account sends a thousand requests a minute. Why every public endpoint needs one is in what is rate limiting.
5. Know how your data is backed up
A bad change or a wrong prompt can delete data, and "undo" isn't a backup. Whether you use a Bolt database or your own Supabase, what's retained and how far back you can restore depends on that database's plan — so check your project rather than assume. Find the backup settings, confirm they're on, and once, confirm you could restore. Why this matters, including an AI agent that wiped a live database, is in backups, and losing everything.
6. Review what Bolt built — don't trust the first answer
Bolt's scan is a real head start, but a passing scan isn't a full review. After the Moltbook exposure, Wiz wrote that "today’s AI tools don’t yet reason about security posture or access controls on a developer’s behalf" The habit that catches the rest is to make Bolt check its own work: after it builds a data or auth feature, ask it to find ways one user could reach another's data, and to name any table without a policy. That generate-then-attack loop is in the verify loop. For the tool-agnostic version of all six, see the 6 checks before you share a vibe-coded app.
Quick answers
Does Bolt's security scan mean my app is safe?
It's a strong start — Bolt's docs say the scan checks that private keys and passwords aren't in your code or sent to browsers, and looks for ways one person could see, change or delete data that isn't theirs. But rate limits, backups and a real review are still yours, and a scan can't catch everything.
Where does my data live in a Bolt app?
Either in a Bolt database or in your own Supabase project — Bolt's docs let you create a Bolt database or connect your own. Either way, the rule that stops people reading each other's rows (Row Level Security) is something you confirm.
Where do my keys need to be set when I deploy a Bolt app?
Check your project's hosting settings. Bolt's docs describe environment variables as per-deployment values — ones that change depending on where the app is deployed — so confirm they're set where the app is hosted rather than assume they travelled with the code, and rebuild.
Do I need to read code for these checks?
Mostly no. Run Bolt's scan and read it; confirm backups in your database settings; ask Bolt where keys and rate limits live. If the answers don't make sense, that's when to bring in a developer.
This page has no affiliate links or sponsored placements. Security advice is only useful if nobody's paying for it. It isn't a substitute for a security review: if your app holds other people's personal data, payments or health information, have a developer or a security professional look at it before launch.
