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CVE-2026-50157— Auth0 Symfony: Bearer Token Accepted via URL Query Parameter in Auth0 Symfony SDK

Quick assessment

Affected
auth0 symfony
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Auth0 symfony是Auth0公司开源的一个Web应用框架。 Auth0 symfony 5.0.0-BETA0版本至5.9.0之前版本存在信息泄露漏洞，该漏洞源于Authorizer安全认证器中Authorizer::authenticate()和Authorizer::supports()路径会接受来自令牌URL查询参数的OAuth 2.0承载访问令牌，查询字符串中的令牌可能被记录在服务器日志、浏览器历史或引用数据中，进而被重放至受保护的API端点，可能导致访问令牌泄露。

CVSS 6.5 · Medium EPSS 0.51% · P43

Possible ATT&CK Techniques 1 AI

T1040 · Network Sniffing

Affected Version Matrix 1

VendorProduct Version RangeStatus
auth0 symfony >= 5.0.0-BETA0, < 5.9.0 affected
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I. Basic Information for CVE-2026-50157

Vulnerability Information
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Vulnerability Title
Auth0 Symfony: Bearer Token Accepted via URL Query Parameter in Auth0 Symfony SDK
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
通过GET请求中的查询字符串导致的信息暴露
Source: CVE Program / CVE List V5
Vulnerability Title
Auth0 symfony 信息泄露漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Auth0 symfony是Auth0公司开源的一个Web应用框架。 Auth0 symfony 5.0.0-BETA0版本至5.9.0之前版本存在信息泄露漏洞，该漏洞源于Authorizer安全认证器中Authorizer::authenticate()和Authorizer::supports()路径会接受来自令牌URL查询参数的OAuth 2.0承载访问令牌，查询字符串中的令牌可能被记录在服务器日志、浏览器历史或引用数据中，进而被重放至受保护的API端点，可能导致访问令牌泄露。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
auth0 symfony >= 5.0.0-BETA0, < 5.9.0 -

II. Public POCs for CVE-2026-50157

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III. Intelligence Information for CVE-2026-50157

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Patches & Fixes for CVE-2026-50157 (1)

Vendor Advisories for CVE-2026-50157 (1)

Vendor Pages for CVE-2026-50157 (1)

IV. Related Vulnerabilities

Same product: symfony
Same vendor: auth0
Same weakness: CWE-598