4.0.0-beta.9 next15.0.3 callback URL: basePath not supported

[sean0x42]

Checklist

• The issue can be reproduced in the nextjs-auth0 sample app (or N/A).
• I have looked into the Readme, Examples, and FAQ and have not found a suitable solution or answer.
• I have looked into the API documentation and have not found a suitable solution or answer.
• I have searched the issues and have not found a suitable solution or answer.
• I have searched the Auth0 Community forums and have not found a suitable solution or answer.
• I agree to the terms within the Auth0 Code of Conduct.

Description

The callback URL after a successful login does not support a Next.js basePath. Even attaching the basePath to the APP_BASE_URL environment variable doesn't solve the issue.

You can verify this yourself by creating a URL in your browser console. e.g.:

new URL("/auth/callback", "https://localhost:3000/my-special-app");
// https://localhost:3000/auth/callback

Since basePath is a configurable property in Next.js (and a common requirement) I would expect this library to automatically detect and inject this basePath.

Reproduction

1. Follow the steps in the README to setup your app
2. Set a basePath in the next.config.js file
3. Try to login. In my case, since the URL without the base path is not in the allowed callback URLs, I see the following error:

"http://localhost:3000/auth/callback is not in the list of allowed callback URLs"

Additional context

No response

nextjs-auth0 version

4.0.0-beta.9

Next.js version

next15.0.3

Node.js version

22.11.0

[guabu]

Hi @sean0x42 👋 Currently the routes mounted by the SDK are not customizable. However, we will be making this configurable in the next release!

[nandan-bhat]

This issue is fixed on 4.0.0-beta.10. Closing this ticket.