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EUVD-2026-263991

fkie_cve-2025-68129

Auth0-PHP is a PHP SDK for Auth0 Authentication and Management APIs. In applications built with the Auth0-PHP SDK, the audience validation in access tokens is performed improperly. Without proper validation, affected applications may accept ID tokens as Access tokens. Projects are affected if they use Auth0-PHP SDK versions between v8.0.0 and v8.17.0, or applications using the following SDKs that rely on the Auth0-PHP SDK versions between v8.0.0 and v8.17.0: Auth0/symfony versions between 5.0.0 and 5.5.0, Auth0/laravel-auth0 versions between 7.0.0 and 7.19.0, and/or Auth0/wordpress plugin versions between 5.0.0-BETA0 and 5.4.0. Auth0/Auth0-PHP version 8.18.0 contains a patch for the issue.

GHSA-j2vm-wrq3-f7gf — Auth0-PHP SDK has Improper Audience Validation

Affected: Packagist: auth0/auth0-php

### Description In applications built with the Auth0-PHP SDK, the audience validation in access tokens is performed improperly. Without proper validation, affected applications may accept ID tokens as Access tokens. ### Affected product and versions Projects are affected if they meet the following preconditions:

- Applications using the Auth0-PHP SDK, versions between v8.0.0 and v8.17.0, or - Applications using the following SDKs that rely on the Auth0-PHP SDK versions between v8.0.0 and v8.17.0: - a. Auth0/symfony, - b. Auth0/laravel-auth0, - c. Auth0/wordpress.

### Resolution Upgrade Auth0/Auth0-PHP to version 8.18.0 or greater.

### Acknowledgement Okta would like to thank Jafar Sadiq (iaf4r) for their discovery and responsible disclosure.