Is Replit Safe?
Replit has strong platform security with container isolation. Main risks come from AI-generated code, public repl exposure, and database configuration.
Public by Default
Replit projects are public by default unless you have a paid plan. This means your source code, including potentially sensitive logic, is visible to anyone. Always use Replit Secrets for sensitive data.
Common Security Issues
Exposed Secrets
API keys and credentials accidentally hardcoded instead of using Replit Secrets become visible in public repls.
Insecure API Endpoints
AI-generated server code may lack proper authentication and authorization checks.
Database Misconfigurations
Replit's database integrations require manual security configuration that AI may skip.
Missing Input Validation
AI-generated code often assumes valid input, leading to injection vulnerabilities.
Security Assessment
Strengths
- + Container-based isolation between projects
- + Built-in secrets management for environment variables
- + Automatic HTTPS for deployed applications
- + Regular platform security updates
- + Mature platform with years of security refinement
Concerns
- - AI-generated code may contain vulnerabilities
- - Secrets can be accidentally committed to code
- - Public repls expose source code by default
- - Database integrations require manual security setup
- - Shared hosting means resource isolation concerns
The Verdict
Replit is a mature platform with solid infrastructure security. The main risks come from the public-by-default model and AI-generated code quality. Always use Replit Secrets, make sensitive projects private, and review AI-generated code for security issues before deployment.
Related Resources
Scan Your Replit App
Let VibeEval automatically check your Replit application for security vulnerabilities.
Start Security Scan