Is my v0 app secure?
v0 writes the app and Vercel deploys it, with databases one click away. The line to watch is between the variables the server keeps and the ones the browser receives.
What v0 handles.
- ✓Deployment on Vercel, served over HTTPS
- ✓One-click database integrations, including Supabase, Neon, Upstash and Vercel Blob
- ✓Environment variables added to the project by each integration, managed in project settings
From the platform’s own documentation: v0 docs: Databases · Vercel docs: Framework environment variables
What stays yours.
- →Which variables carry a public prefix, and so reach the browser
- →Row level security on the database tables, when the database is Supabase
- →Authorization in every API route and server action
- →Who can open preview deployments that hold real data
- →Security headers on the deployed app
Documented.
Public reports that involve v0 or apps built on it, dated and linked. Each line says what its source says, and nothing more.
- June 2, 2026A scan of 1,072 Supabase-backed apps
Symbiotic Security scanned 1,072 apps built with Lovable, v0, Bolt.new, Replit and Windsurf that use Supabase. It reports that 98% had at least one vulnerability, 308 exposed the anon key in JavaScript, 172 allowed data to be changed or deleted without signing in, and 197 had a CORS misconfiguration on the Supabase API.
Source: Symbiotic Security, June 2, 2026 - May 8, 2026A scan of 5,600 live apps built with AI tools
VentureBeat reports that Escape.tech scanned 5,600 publicly available apps built with AI tools in October 2025 and found more than 2,000 high-impact vulnerabilities, over 400 exposed secrets and 175 instances of exposed personal data. The report does not break the results down by platform.
Source: VentureBeat, May 8, 2026
A five minute check.
In your own v0 dashboard, in this order.
- List the public variablesOpen Project menu, Settings, Environment Variables. Any name starting with NEXT_PUBLIC_ (or the framework’s public prefix) ships to the browser, so none of them can be a secret.
- Find the privileged keysA Supabase secret or service_role key should appear only in server code: route handlers and server actions, never in a component the browser loads.
- Check row level securityIf Supabase is connected, open its dashboard and confirm RLS is on for every table in the public schema.
- Read one API routeOpen the route that returns customer data and confirm it checks the signed-in user on the server before answering.
- Check preview linksPreview deployments get their own URLs. If they connect to real data, confirm in Vercel that they are protected.
Questions.
Is it safe that v0 added keys to my project?
Integration keys are stored as environment variables, which is the right place. The risk is a secret key given a public prefix, or imported into code that runs in the browser.
Does Vercel secure my database?
Vercel hosts the app. Access to rows in the database is decided by the database: in Supabase, by row level security policies you set.
Can I keep generating with v0 after a fix?
Yes. Tests on the paths that touch money and customer data keep the next generation from quietly undoing a fix.
Check the public side now.
Ten seconds. We read only what any visitor’s browser already sees, and store nothing.
Opens the app security check on this site with your address filled in.
How it works, in four steps.
Scan
Check the protections any visitor’s browser can see, then run the deeper scan on an app you prove is yours.
Run the scan → 2 · AuditAI-Build Audit
A signed report within 48 hours: what is exposed, what you own, and the order to fix it in.
Ask for the audit → 3 · FixFix
The report’s list, fixed for a set price by a set date. If we miss the target, the next week is on me.
Ask about the fix → 4 · GuardGuard
A weekly automated scan, dependency and model updates, a monthly senior review, and one named person who answers.
Ask about Guard →