Lovable vs Bolt.new Security
Compare the security implications of the two most popular AI app builders. Understand the risks and build safely with either platform.
Quick Security Comparison
| Feature | Lovable | Bolt.new |
|---|---|---|
| Default Backend | Supabase | Various (configurable) |
| Known CVEs | CVE-2025-48757 | None published |
| Execution Environment | Cloud-based | WebContainer (browser) |
| File System Access | Server-side | Browser sandbox |
| MCP/Agent Support | Yes (vulnerable) | Limited |
| Auth Integration | Supabase Auth | Various options |
Security Model Comparison
Lovable Security Model
Lovable runs on cloud infrastructure with Supabase backend integration and agentic AI capabilities.
Bolt.new Security Model
Bolt.new uses StackBlitz WebContainers to run Node.js in the browser, providing sandbox isolation.
Common Vulnerabilities
Lovable Vulnerabilities
CVE-2025-48757: MCP Remote Code Execution
Lovable's MCP server was vulnerable to prompt injection attacks that could trigger arbitrary command execution on user systems.
Read full analysis →Supabase Misconfiguration
AI may generate apps with disabled RLS or overly permissive policies. Always verify database security before deploying.
Bolt.new Vulnerabilities
Insecure Code Generation
Like all AI tools, Bolt may generate code with vulnerabilities including XSS, missing auth checks, and exposed API keys.
Backend Configuration Left to User
Bolt focuses on frontend; users must properly configure and secure their chosen backend, which may lead to misconfigurations.
Security Recommendations
Choose Lovable When...
- You want integrated Supabase backend
- You need full-stack app generation
- Built-in auth is important
Security note: Keep updated for CVE patches, verify RLS policies
Choose Bolt.new When...
- Browser sandbox isolation matters
- You have your own backend
- Rapid prototyping is priority
Security note: Configure backend security yourself
Security Best Practices for Both
Scan before deploying
Run security scans on generated code. Both platforms can produce vulnerable code.
Configure authentication properly
Don't deploy apps without auth. Both platforms support auth—use it.
Review database security
Check RLS/security rules. AI often generates overly permissive configurations.
Don't expose API keys
Move secrets to environment variables. AI often hardcodes keys in frontend.
Test with multiple accounts
Verify users can't access each other's data. Test authorization, not just authentication.
Frequently Asked Questions
Which platform is more secure by default?
Bolt.new's browser sandbox provides better isolation, but Lovable's integrated Supabase setup can be more secure when properly configured. Neither is 'secure by default'—both require proper configuration.
Should I be worried about Lovable's CVE?
CVE-2025-48757 has been patched. Keep Lovable updated and be cautious about processing untrusted content. The vulnerability required prompt injection through external content.
Can I trust the code these tools generate?
No—always review generated code. Both platforms can produce code with XSS vulnerabilities, exposed secrets, and missing authorization. Security scanning before deployment is essential.
Which is better for production apps?
For production, both require additional security work. Lovable's Supabase integration provides a solid foundation when RLS is properly configured. Bolt needs more manual backend setup but offers flexibility.
Get Starter Scan
Whichever platform you use, verify your app's security before going live.
Get Starter ScanLast updated: January 2025