Unsafe Access of FRONTEND_URL Environment Variable in CORS Configuration

[beetle-ai]

ISSUE_NUMBER: GH-1

Description

The app.ts file accesses process.env.FRONTEND_URL! directly within the CORS configuration without any fallback or validation. If this environment variable is not defined, it can lead to runtime errors or incorrect CORS behavior, potentially exposing the API or preventing legitimate cross-origin requests.
File: repositories/chatgptapi/src/app.ts
Line: 38
Severity: high

Current Behavior

The application assumes process.env.FRONTEND_URL will always be defined due to the use of the non-null assertion operator (!). If it's undefined, the application might crash or have an insecure CORS configuration.

Expected Behavior

The application should safely retrieve FRONTEND_URL, providing a default value, throwing a clear error if it's critical and missing, or implementing a more robust environment variable loading strategy.

Suggested Fix

Implement a check for the existence of process.env.FRONTEND_URL and provide a default value (e.g., http://localhost:3000 for development) or throw an explicit error during application startup if it's missing in a production context.

Code Context

app.use(
cors({
origin: [process.env.FRONTEND_URL!], // Issue: Unsafe access
methods: ["GET", "POST", "PUT", "DELETE"],
credentials: true,
}),
);

Additional Notes

This issue can lead to application instability and potential security risks related to cross-origin resource sharing. It's crucial to ensure all critical environment variables are properly loaded and validated.