[IT-SecNots] [Security-news] Simple OAuth (OAuth2) & OpenID Connect - Critical - Access bypass - SA-CONTRIB-2026-296

[security-news AT drupal.org]

View online: https://www.drupal.org/sa-contrib-2026-296

Project: Simple OAuth (OAuth2) & OpenID Connect [1]
Project machine name: simple_oauth
Date: 2026-November-04
Security risk: *Critical* 15 ∕ 25
AC:Complex/A:Admin/CI:All/II:All/E:Theoretical/TD:Default [2]
Vulnerability: Access bypass

Affected versions: <5.2.6 || >=6.0.0 <6.0.10 || >=6.1.0 <6.1.4
CVE IDs: CVE-2026-122058
Description: 
This module introduces an OAuth 2.0 authorization server, which can be
configured to protect your Drupal instance with access tokens, or allow
clients to request new access tokens and refresh them.

The module doesn't sufficiently restrict access to consumer configuration.
Users who can create or edit consumers can potentially configure malicious
consumers and obtain tokens with additional privileges. This can allow them
to access the site as another user, up to full administrative access.

This vulnerability is mitigated by the fact that an attacker must have a role
with the /Add consumer entities/ or /Update own consumer entities/
permissions.

Solution: 
Install the latest version:

 * If you use version 6.1.x, upgrade to Simple OAuth (OAuth2) & OpenID
   Connect 6.1.4 [3].
 * If you use version 6.0.x, upgrade to Simple OAuth (OAuth2) & OpenID
   Connect 6.0.10 [4].
 * If you use version 5.2.x, upgrade to Simple OAuth (OAuth2) & OpenID
   Connect 5.2.6 [5].

Additional steps are required after updating:

 * Configuring the access a consumer grants requires the new /Administer
   consumer access settings/ permission. Grant it only to trusted roles.
 * In 6.1.x, Client Credentials tokens are now always limited to their
   scopes. The update does not change existing consumers. Review them, and
   revoke their tokens if in doubt.

Reported By: 
 * Andrei Lungu (andrei.lungu) [6]
 * Drew Webber (mcdruid) [7] of the Drupal Security Team

Fixed By: 
 * Bojan Bogdanovic (bojan_dev) [8]

Coordinated By: 
 * Swan Kalata (akalata) [9] of the Drupal Security Team
 * Juraj Nemec (poker10) [10] of the Drupal Security Team
 * Jess  (xjm) [11] of the Drupal Security Team

------------------------------------------------------------------------------
Contribution record [12]

[1] https://www.drupal.org/project/simple_oauth
[2] https://www.drupal.org/drupal-security-team/security-risk-levels-defined
[3] https://www.drupal.org/project/simple_oauth/releases/6.1.4
[4] https://www.drupal.org/project/simple_oauth/releases/6.0.10
[5] https://www.drupal.org/project/simple_oauth/releases/5.2.6
[6] https://www.drupal.org/u/andreilungu
[7] https://www.drupal.org/u/mcdruid
[8] https://www.drupal.org/u/bojan_dev
[9] https://www.drupal.org/u/akalata
[10] https://www.drupal.org/u/poker10
[11] https://www.drupal.org/u/xjm
[12]  
https://new.drupal.org/contribution-record?source_link=https%3A//www.drupal.org/node/3634965

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