Bolt.new Security Checklist: 15-Item Guide Before Deploying

TL;DR

This 15-item checklist covers the most common security issues in Bolt.new-generated apps: exposed API keys, missing Supabase RLS, and frontend-only authentication. 5 critical items must be fixed before launch, 6 important items within the first week, and 4 recommended items when you can.

Bolt makes it ridiculously easy to go from idea to deployed app. That speed is also what makes it risky. The generated code prioritizes getting things working, not locking them down. Spend 45 minutes with this checklist before you share that deploy link with anyone.

Quick Checklist (5 Critical Items)

Search for hardcoded API keysLook for sk_, pk_, api_key, SUPABASE_KEY in your code

Enable RLS on all Supabase tablesTables without RLS are publicly accessible

Verify service role key is not exposedThe service_role key bypasses all RLS - must never be in frontend

Verify .env is in .gitignoreCheck before pushing to GitHub

Test protected routes without loginTry accessing /dashboard directly in an incognito window

API Keys & Secrets 5

Search for hardcoded API keysLook for sk_, pk_, api_key, apiKey, secret, password, SUPABASE_KEY in your code. How to secure API keys

Check browser DevTools Network tabOpen your app, refresh, and verify no secret keys appear in request headers or bodies. How to inspect network requests

Verify .env is in .gitignoreBolt generates .env files that must not be committed to your repository. How to secure .env files

Move secrets to deployment platformSet environment variables in Vercel, Netlify, or your host instead of .env files. How to configure env variables

Verify public vs private key usageOnly anon/public keys should be in frontend code. Service keys belong on the server. How to separate client/server keys

Supabase Security 4

Enable RLS on all tablesGo to Supabase Dashboard > Authentication > Policies and verify RLS is ON for every table. How to set up Supabase RLS

Write RLS policies for each tableTables with RLS enabled but no policies block all access. Add appropriate SELECT, INSERT, UPDATE, DELETE policies. How to write RLS policies

Test data isolationLog in as User A and try to access User B's data by changing IDs in the URL or requests. How to test data isolation

Verify service role key is not exposedThe service_role key bypasses RLS. It must never appear in frontend code. How to protect service role key

Authentication 3

Test protected routes without loginTry accessing /dashboard, /account, or other protected pages directly without logging in. How to test protected routes

Verify server-side auth checksFrontend route protection is not enough. API routes and database queries must verify the user. How to implement server-side auth

Check session expirationSessions should expire after a reasonable time. Logout should clear all tokens. How to configure sessions

Input & Output 3

Test forms with malicious inputEnter <script>alert('xss')</script> in text fields and verify it does not execute. How to prevent XSS

Validate input on the serverNever trust client-side validation alone. Always validate on backend or database level. How to validate on server

Check file uploads (if applicable)Validate file types, limit sizes, and ensure storage bucket policies are set correctly. How to secure file uploads

Why Bolt.new Apps Need Extra Review

Bolt.new is excellent for rapid prototyping. It gets you from idea to working app fast, but that speed comes with tradeoffs: the generated code is built to work, not to hold up under attack. A 2025 Stanford study found that 40% of AI-generated code samples contained at least one security vulnerability.

We see the same three issues over and over in Bolt.new apps: exposed Supabase service keys that bypass Row Level Security entirely, missing RLS policies, and frontend-only authentication that a curious user can bypass with browser DevTools in under a minute.

What should I check before deploying a Bolt.new app?

Check for hardcoded API keys first. Then verify Supabase RLS is enabled on all tables, confirm authentication runs on both frontend and backend, test database access controls, and validate user inputs. Run through this complete checklist to catch the most common issues.

Is Bolt.new secure for production apps?

Bolt.new's platform is secure. What it generates isn't automatically. The code comes out functional fast, and it still needs a security review before production: exposed API keys, missing database security rules, and frontend-only authentication are the usual culprits. Use this checklist, and consider an automated security scan too.

How do I fix Supabase RLS issues in Bolt apps?

Go to your Supabase Dashboard, navigate to Authentication > Policies, and verify RLS is enabled for every table. Then add appropriate policies. For user-owned data, use policies like: CREATE POLICY "Users can view own data" ON table_name FOR SELECT USING (auth.uid() = user_id).

TL;DR

Quick Checklist (5 Critical Items)

API Keys & Secrets 5

Supabase Security 4

Authentication 3

Input & Output 3

Why Bolt.new Apps Need Extra Review

What should I check before deploying a Bolt.new app?

Is Bolt.new secure for production apps?

How do I fix Supabase RLS issues in Bolt apps?

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Bolt.new Security Guide

Supabase Security Checklist

How to Set Up Supabase RLS

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Bolt.new Security Checklist: 15-Item Guide Before Deploying