Is My Bolt App Secure?
Bolt apps benefit from WebContainer isolation and a built-in security audit in V2, but you still need to manage secrets through Edge Functions, configure authentication properly, and review flagged vulnerabilities before deploying.
Why this matters
Bolt.new runs code in isolated WebContainers in the browser, which provides a baseline of safety during development. But once deployed, your app's security depends on how you handle secrets, authentication, and database access.
What's at stake
A deployed Bolt app with exposed API keys or missing auth can be exploited just like any other web app. The WebContainer protects your development environment — not your production users.
Your checklist.
API keys are stored in Project Settings secrets, not in code
CriticalBolt V2 lets you manage secrets in Project Settings. These are accessed through Edge Functions, creating a secure tunnel between your app and third-party services.
Authentication is configured (native or external)
CriticalBolt V2 includes native authentication with email/password, email verification, and leaked password detection. If you need OAuth or social login, integrate an external provider.
Security audit has been reviewed and issues fixed
ImportantBolt V2 includes a security audit that flags issues like missing password checks or unprotected routes. Review and fix flagged items before deploying.
Database access is properly restricted
ImportantIf using an external database like Supabase, ensure RLS is enabled. If using Bolt Cloud database, verify that access controls are configured.
Error messages do not expose system details
RecommendedEnsure your deployed app shows generic error messages. Stack traces and database errors visible to users can help attackers understand your system.
Verify your Bolt app is production-secure
- Security readiness checks tailored to Bolt-built apps
- Public security badge showing your app passed baseline checks
- Builder log to share your security approach with users
Keep learning.
Related tools
Related guides
Frequently asked questions.
Bolt V2 adds native authentication, a security audit feature, and secure secret management. However, you still need to review the audit results and fix flagged issues. Security is not fully automatic.
WebContainers isolate your development environment in the browser, preventing malicious code from affecting your local system. However, this isolation protects your development machine — your deployed app's security depends on your code and configuration.
Go to Project Settings in Bolt V2 and add your secrets there. Access them through Edge Functions, which act as a secure bridge between your app and external services. Never put API keys directly in your frontend code.
Bolt native auth is sufficient for most apps — it includes email/password, verification, and leaked password detection. Use an external provider like Supabase Auth or Auth0 if you need OAuth, social logins, or advanced features like MFA.