Auth0 Symfony: Bearer Token Accepted via URL Query Parameter in Auth0 Symfony SDK
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Information disclosure
- Confidentiality · integrity · availability
- High · None · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-200.
Summary
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.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| auth0 | symfony | 5.0.0-BETA0 to before 5.9.0 | 5.9.0 | Patch available | CNA |
| — | auth0/symfony (Packagist) | 5.0.0-BETA0 to before 5.9.0 | 5.9.0 | Patch available | GHSA-ffq7-hh2j-r24p |
- symfony Vendorauth0 Affected 5.0.0-BETA0 to before 5.9.0 Fixed in 5.9.0 Patch available CNA
- auth0/symfony (Packagist) Vendor— Affected 5.0.0-BETA0 to before 5.9.0 Fixed in 5.9.0 Patch available GHSA-ffq7-hh2j-r24p
Remediation
- Fix · CNA symfony (auth0) Fixed in 5.9.0
- Fix · GHSA-ffq7-hh2j-r24p auth0/symfony (Packagist) Fixed in 5.9.0 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2026-50157
- 2026-10-03 Alias added: GHSA-ffq7-hh2j-r24p
References
Other 5
- https://github.com/auth0/symfony/security/advisories/GHSA-ffq7-hh2j-r24p
- https://github.com/auth0/symfony/commit/bd1851b14ae15e99cbe87c96496cf25da025288a
- https://github.com/auth0/symfony/releases/tag/5.9.0
- https://github.com/auth0/symfony/commit/172d1d3e0b9d1e93610d786118389a811179bc8a
- https://github.com/auth0/symfony
More auth0 vulnerabilities
- TI-2015-07615 Improper input validation in HackerOne jsonwebtoken node module CVSS 3.0CRITICAL 9.8
- TI-2025-29805 Brute Force Authentication Tags of CookieStore Sessions in Auth0-PHP SDK CVSS 3.1CRITICAL 9.1
- TI-2025-31089 Auth0-PHP SDK Deserialization of Untrusted Data vulnerability CVSS 4.0CRITICAL 9.3
- TI-2020-06427 An issue was discovered in the Login by Auth0 plugin before 4.0.0 for WordPress. CVSS 3.1CRITICAL 9.8
- TI-2018-05020 The Auth0 authentication service before 2017-10-15 allows privilege escalation because… CVSS 3.0CRITICAL 9.8
- TI-2019-05387 Auth0 Auth0-WCF-Service-JWT before 1.0.4 leaks the expected JWT signature in an error… CVSS 3.0CRITICAL 9.8
Sources
- CVE-2026-50157 · CVE Program
- CVE-2026-50157 · NVD
- FIRST EPSS
- GHSA-ffq7-hh2j-r24p · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences