Bolt.new Security

Is Your Bolt.new App Leaking API Keys?

Bolt.new makes full-stack development incredibly fast - but speed often comes at the cost of security. We've found an average of 31 vulnerabilities per Bolt app scanned.

Live Security Progressmyapp.bolt.new
Auto-fix run
32
Needs attention
5 issues still open.
CRITICALAPI keys exposed in browser JavaScript
HIGHCORS open to every website
HIGHForms accept unsafe input
HIGHUntrusted package installed by typo
MEDNo rate limit on login endpoint

Industry Data

Observed across scanned apps
#1Avg vulnerabilities per Bolt app
0
#2Apps with exposed API keys
0%
#3Apps with CORS wildcard
0%
#4Critical issues found on first scan
0.0

The 6 Most Common Bolt.new Security Mistakes

These issues appear in the majority of Bolt apps - most developers don't discover them until it's too late.

Critical
API Keys in Client-Side Bundles
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Critical risk
What this means for your app

Bolt.new apps frequently ship with API keys (OpenAI, Stripe, database credentials) embedded directly in JavaScript bundles visible to anyone who opens DevTools.

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High
CORS Wildcard Configuration
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High risk
What this means for your app

Bolt generates backends with CORS set to accept all origins (*), allowing any website to make authenticated requests to your API on behalf of your users.

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High
No Input Validation or Sanitization
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High risk
What this means for your app

Bolt-generated APIs typically accept any input without validation, leaving them vulnerable to SQL injection, XSS, and other injection attacks at every endpoint.

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High
Hallucinated Package Dependencies
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High risk
What this means for your app

Bolt sometimes installs npm packages that don't exist or are typosquatted versions. These can contain malicious code that silently exfiltrates your environment variables.

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Medium
Missing Rate Limiting
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Medium risk
What this means for your app

No rate limiting on API endpoints or login forms, making your app trivially vulnerable to brute-force attacks and API abuse that drains your usage budget.

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Medium
Debug Endpoints in Production
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Medium risk
What this means for your app

Bolt sometimes generates debug or admin API endpoints that remain accessible in production without authentication, exposing internal data and operations.

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How PolyDefender Fixes This

Purpose-built for Bolt apps - not generic security advice

Scan any Bolt.new deployed URL - no code access needed
Detects all 6 common issues above + 15 more vulnerability types
Bolt-specific fix instructions, not generic security advice
Scans JavaScript bundles for exposed API keys and secrets
Tests API endpoints for IDOR, injection, and auth bypass
Results in under 5 minutes, 3 free scans per account

PolyDefender vs. Generic Scanners

🔍

Generic Scanner

  • ✗Finds: OWASP basics only
  • ✗Requires: code or repo access
  • ✗Advice: generic remediation docs
  • ✗Misses: Bolt bundle analysis, npm hallucinations
  • ✗Context: none - same for every app

PolyDefender for Bolt.new

  • ✓Finds: Bolt-specific vulnerabilities
  • ✓Requires: only your public app URL
  • ✓Advice: Bolt-specific fix steps
  • ✓Checks: bundle secrets, CORS, debug endpoints
  • ✓Context: built for how Bolt generates code

Scan Your Bolt.new App Now

Free scan - see your security score and every vulnerability in under 5 minutes. No code access, no signup required.

1See your score
2Read findings
3Fix with AI
No signup required65 security checksResults in <5 minFree forever