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CVE-2026-50157

Auth0 Symfony: Bearer Token Accepted via URL Query Parameter in Auth0 Symfony SDK

CVSS 3.1 6.5 MEDIUMCheck source for fixed versionsKEV status unknown

Original advisory

cve-program · CVE-2026-50157

Published

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.

Read the publisher's advisory

Affected versions, risk and source history

cve-program · CVE-2026-50157

Published

symfony

Vendor product

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "auth0",
                    "product": "symfony",
                    "versions": [
                        {
                            "version": ">= 5.0.0-BETA0, < 5.9.0",
                            "status": "affected"
                        }
                    ]
                }

Original source record · Cite this exact observation · Complete original publisher JSON