CVE-2026-50157 Auth0 Symfony: Bearer Token Accepted via URL Query Parameter in Auth0 Symfony SDK
The Auth0 Symfony SDK accepts bearer tokens via URL query parameters, risking token exposure in logs and history, allowing potential replay attacks.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-50157?
CVE-2026-50157 is a medium-severity vulnerability in auth0 symfony, published on 14 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official 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.
Weakness: CWE-598
Which versions are affected by CVE-2026-50157?
2 open source packages ship an affected version, including auth0/symfony.
| Package | Affected | Fixed in |
|---|---|---|
auth0/symfony Packagist | From 5.0.0-BETA0 | 5.9.0 |
auth0/symfony Packagist | From 5.0.0-BETA0 | 5.9.0 |
How do I fix CVE-2026-50157?
Upgrade auth0/symfony to 5.9.0 or later.
Is CVE-2026-50157 being exploited?
There is no known exploitation of CVE-2026-50157 in the wild and no public exploit code.
Sources
Also known as GHSA-ffq7-hh2j-r24p.