How Do You Secure a Vibe-Coded App?
Securing a vibe-coded app before launch requires addressing a specific set of vulnerabilities that AI coding tools consistently produce. This guide covers the most important steps — in priority order — so you can ship with confidence.
Step 1: Rotate All Secrets Immediately
Before anything else: scan your entire repository and git history for hardcoded API keys, database passwords, Stripe secret keys, and service tokens. Use tools like git-secrets or truffleHog to scan history. Rotate every secret you find — assume it has already been seen if it was ever committed. Move all secrets to environment variables and verify they are not in your .env files if those are committed to source control.
Step 2: Test Your Authentication Flows
Manually test every authentication path: create an account, log in, log out, reset your password, and try to access protected routes without a valid session. Then try accessing another user's data by changing numeric IDs in URLs (IDOR test). If you can read another user's profile or data, you have a critical authorization bug. Test admin routes by logging in as a non-admin user and directly visiting /admin, /dashboard/admin, etc.
Step 3: Review Your API Error Responses
Open your browser devtools and trigger errors in your application. If API responses include stack traces, file paths, database queries, or internal variable names, turn off verbose error mode immediately. In production, errors should return generic messages. Only log details internally, never expose them to the client.
Step 4: Add Rate Limiting to Critical Endpoints
At minimum, add rate limiting to: login endpoints, password reset endpoints, account creation, email verification resend, and any endpoint that sends external requests (emails, SMS, payment charges). Most frameworks have middleware for this — it is a one-day implementation that prevents credential stuffing, enumeration, and cost-draining attacks.
Step 5: Validate Webhooks
If you use Stripe, GitHub, Twilio, or any other service that sends webhooks: validate the webhook signature on every incoming request before processing it. An unvalidated Stripe webhook can be faked by anyone, allowing them to trigger payment confirmations, subscription upgrades, or refunds without actually paying. Stripe's documentation covers this in 10 lines of code.
Step 6: Audit Your Dependencies
Run npm audit, pip-audit, or the equivalent for your stack. Update any dependencies with critical CVEs before launch. Vibe-coded apps often have outdated lockfiles from when the AI initialized the project.
Step 7: Get a Professional Code Audit
The steps above catch the most obvious issues. But a professional code audit will find the ones you don't know to look for — the subtle authorization logic bugs, the race conditions in payment flows, the SQL injection in the dynamic search feature, the prompt injection vector in your AI layer. Most serious security issues in vibe-coded apps are invisible to the person who built them because AI-generated code looks plausible and passes basic testing.