Description When using affected versions of the Next.js SDK, simultaneous requests on the same client may result in improper lookups in the TokenRequestCache for the request results.

Am I Affected? You are affected if you meet the following preconditions: - Applications using the auth0/nextjs-auth0 SDK with a singleton client instance, versions 4.11.0, 4.11.1, and 4.12.0.

Affected product and versions Auth0/nextjs-auth0 v4.11.0, v4.11.1, and v4.12.0.

Resolution Upgrade Auth0/nextjs-auth0 version to v4.11.2 or v4.12.1

Acknowledgements Okta would like to thank Joshua Rogers (MegaManSec) for their discovery and responsible disclosure.