The most common security vulnerabilities in Bolt.new applications—and how to fix them before attackers find them.
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Common vulnerabilities found in Bolt.new applications
Bolt generates code with API keys directly in source files for quick demos.
Immediate key compromise. Attackers can use your OpenAI, Stripe, or other service quotas.
grep -r 'sk-' . or search for 'apiKey' in generated code.
Move all keys to environment variables. Use .env files and process.env.
Supabase or Firebase databases created without access controls configured.
Anyone can read/write all data. Complete database compromise.
Try querying database without authentication. If it works, rules are missing.
Enable RLS (Supabase) or write Security Rules (Firebase) before deployment.
Production builds include source maps, exposing original code.
Business logic exposed, easier vulnerability discovery, potential secret leak.
Check if /bundle.js.map is accessible or look for sourceMappingURL in JS files.
Set productionBrowserSourceMaps: false in next.config.js or equivalent.
AI-generated code often relies on client-side validation only.
Input validation bypass, injection attacks, data integrity issues.
Inspect API calls - if validation only happens in browser, it's vulnerable.
Add validation in API routes/server functions. Never trust client input.
Session cookies without proper security flags (HttpOnly, Secure, SameSite).
Session hijacking through XSS, man-in-the-middle attacks.
Check cookies in browser DevTools > Application > Cookies.
Configure auth library to set secure cookie flags.
Verbose error messages and debug endpoints left enabled.
Information disclosure, easier attack surface mapping.
Trigger errors and see if stack traces are exposed.
Set NODE_ENV=production. Configure proper error handling.
No rate limiting on auth or API endpoints.
Brute force attacks, API abuse, potential DoS.
Send many requests quickly - if none are blocked, no rate limiting.
Implement rate limiting middleware or use API gateway features.
VAS scans your Bolt.new app for all these issues automatically. Free scan, instant results.
Scan Your App NowThe most common issues are: exposed API keys/secrets, missing database access controls (RLS or Security Rules), weak authentication configuration, and missing security headers. These account for over 80% of vulnerabilities in Bolt.new applications.
Run a VAS security scan for automated detection of common vulnerabilities. Manually check: database access controls, search code for hardcoded secrets, verify authentication settings, and test security headers. VAS catches all of these automatically.
Yes, nearly all Bolt.new security issues are configuration problems with straightforward fixes. Missing RLS, exposed secrets, weak auth—all have clear remediation steps. Most fixes take under an hour to implement.
Exposed databases and API keys can be discovered within minutes using automated scanners. Attackers actively scan for common patterns. This is why security configuration must happen before deployment, not after.
Bolt.new provides security features, but they require configuration. Security isn't automatic—you must enable database access controls, manage secrets properly, configure auth settings, and add security headers. The tools exist; you must use them.
Last updated: January 16, 2026