CVE-2026-50157: Auth0/symfony Auth0 Symfony SDK Accepted Bearer Vulnerability

MODERATE
Advisory Identifier: GHSA-ffq7-hh2j-r24p
Share
CVSS 6.5
CWE-598 CWE-200
Published
Advisory Summary

CVE-2026-50157 is a MODERATE (CVSS 6.5) auth0 symfony sdk accepted bearer vulnerability (CWE-598: Use of HTTP Request With Sensitive Query String) affecting Auth0/symfony libraries in the Packagist ecosystem. The issue involves auth0 symfony sdk accepted bearer tokens via url query parameter. Remediation is available by upgrading affected packages to version 5.9.0.

CVE-2026-50157 at a Glance

CVE Identifier CVE-2026-50157
GHSA Identifier GHSA-ffq7-hh2j-r24p
Severity MODERATE
CVSS v3.1 Base Score 6.5
CWE Classification CWE-598: Use of HTTP Request With Sensitive Query String
Affected Product Auth0/symfony
Package Ecosystem Packagist
Published Date
Last Updated

Security Impact

CVSS: 6.5

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required Low (PR:L)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality High (C:H)
Integrity None (I:N)
Availability None (A:N)

How to Fix CVE-2026-50157

To remediate this vulnerability, upgrade all affected Auth0/symfony dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

auth0/symfony fixed: 5.9.0 
Upgrade auth0/symfony to 5.9.0
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

inspect dependencies for auth0/symfony

How to Check if You Are Affected

To determine whether your application is affected by CVE-2026-50157, inspect your project dependencies for Auth0/symfony:

inspect dependencies for auth0/symfony

Analyze the terminal output to locate any version of Auth0/symfony in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 5.9.0), your application is affected.

Note: Verify declared build manifests and deployed runtime container environments.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-598: Use of HTTP Request With Sensitive Query String, where the web application uses an http method to process a request, but the request includes sensitive information in the query string. In Auth0/symfony, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

### Description Applications built with the Auth0 Symphony SDK, using the Authorizer security authenticator to protect HTTP routes may accept OAuth 2.0 bearer access tokens provided through a URL query parameter, in addition to the standard Authorization header, which may increase the risk of access token exposure and replay against protected API endpoints. ### Resolution Upgrade auth0/symfony to version 5.9.0 or greater. ### Acknowledgement Okta would like to thank Alex Yeara for their discovery.

CVE-2026-50157 Affected Auth0/symfony Versions

1 component(s)
Fixed Versions:
5.9.0
Product / Package Ecosystem Affected Versions Fixed Version
auth0/symfony
 Packagist
≥ 5.0.0-BETA0
< 5.9.0
5.9.0

References

GitHub Advisory / Wiki ADVISORY
https://github.com/auth0/symfony/security/advisories/GHSA-ffq7-hh2j-r24p
Security Fix Commit FIX COMMIT
https://github.com/auth0/symfony/commit/172d1d3e0b9d1e93610d786118389a811179bc8a
Security Fix Commit FIX COMMIT
https://github.com/auth0/symfony/commit/bd1851b14ae15e99cbe87c96496cf25da025288a
Auth0/symfony Source Repository REPOSITORY
https://github.com/auth0/symfony
Auth0/symfony Release RELEASE
https://github.com/auth0/symfony/releases/tag/5.9.0

Frequently Asked Questions

What is CVE-2026-50157?
CVE-2026-50157 is a security vulnerability in Auth0/symfony involving Auth0 Symfony SDK Accepted Bearer Tokens via URL Query Parameter under CWE-598: Use of HTTP Request With Sensitive Query String.
Which Auth0/symfony versions are affected?
Affected versions include releases prior to 5.9.0 across affected packages: auth0/symfony.
What version fixes CVE-2026-50157?
Upgrading to 5.9.0 (or the latest patched release for your respective branch) resolves the vulnerability.
Is auth0/symfony affected?
Yes, auth0/symfony is affected in releases prior to 5.9.0. Upgrade your dependency to 5.9.0 or later.
What is the CVSS score of CVE-2026-50157?
CVE-2026-50157 has a CVSS v3.1 base score of 6.5 (MODERATE) with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.
What CWE is associated with CVE-2026-50157?
CVE-2026-50157 is classified under CWE-598: Use of HTTP Request With Sensitive Query String (The web application uses an HTTP method to process a request, but the request includes sensitive information in the query string.).
How can I check Packagist dependencies for CVE-2026-50157?
Run the dependency tree command: 'inspect dependencies for auth0/symfony'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-ffq7-hh2j-r24p",
  "modified" : "2026-07-14T19:31:23Z",
  "published" : "2026-07-14T19:31:23Z",
  "aliases" : [ "CVE-2026-50157" ],
  "summary" : "Auth0 Symfony SDK Accepted Bearer Tokens via URL Query Parameter",
  "details" : "### Description\nApplications built with the Auth0 Symphony SDK, using the Authorizer security authenticator to protect HTTP routes may accept OAuth 2.0 bearer access tokens provided through a URL query parameter, in addition to the standard Authorization header, which may increase the risk of access token exposure and replay against protected API endpoints.\n\n### Resolution\nUpgrade auth0/symfony to version 5.9.0 or greater.\n\n### Acknowledgement\nOkta would like to thank Alex Yeara for their discovery.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "auth0/symfony"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "5.0.0-BETA0"
      }, {
        "fixed" : "5.9.0"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 5.8.0"
    }
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/auth0/symfony/security/advisories/GHSA-ffq7-hh2j-r24p"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/auth0/symfony/commit/172d1d3e0b9d1e93610d786118389a811179bc8a"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/auth0/symfony/commit/bd1851b14ae15e99cbe87c96496cf25da025288a"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/auth0/symfony"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/auth0/symfony/releases/tag/5.9.0"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-200", "CWE-598" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-07-14T19:31:23Z",
    "nvd_published_at" : null
  }
}