CVE-2026-50157
Auth0 Symfony: Bearer Token Accepted via URL Query Parameter in Auth0 Symfony SDK
Description
Auth0 Symfony is a Symfony SDK for Auth0 Authentication and Management APIs. From 5.0.0-BETA0 until 5.9.0, the Authorizer::authenticate() and Authorizer::supports() paths in the Authorizer security authenticator may accept OAuth 2.0 bearer access tokens from the token URL query parameter as well as the Authorization header for protected HTTP routes. Query-string tokens can be recorded in server logs, browser history, or referrer data and then replayed against protected API endpoints. This issue is fixed in version 5.9.0.
INFO
Published Date :
Sept. 14, 2026, 5:06 p.m.
Last Modified :
Sept. 14, 2026, 5:06 p.m.
Remotely Exploit :
No
Source :
GitHub_M
Solution
- Update the Auth0 Symfony SDK to version 5.9.0 or later.
- Remove sensitive tokens from query parameters.
- Use only the Authorization header for tokens.
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