[IT-SecNots] [Security-news] OpenID Connect / OAuth client - Less critical - Access bypass - SA-CONTRIB-2026-027

[security-news AT drupal.org]

View online: https://www.drupal.org/sa-contrib-2026-027

Project: OpenID Connect / OAuth client [1]
Date: 2026-March-04
Security risk: *Less critical* 9 ∕ 25
AC:Complex/A:User/CI:Some/II:None/E:Theoretical/TD:Default [2]
Vulnerability: Access bypass

Affected versions: <1.5.0
CVE IDs: CVE-2026-3532
Description: 
This module enables you to use an external OpenID Connect login provider to
authenticate and log in users on your site. If a user signs in with a login
provider for the first time on the website, a new Drupal user will be
created.

The module doesn't sufficiently validate the uniqueness of certain user
fields depending on the database engine and its collation.

As a result, a user may be able to register with the same email address as
another user.

This may lead to data integrity issues.

Solution: 
Install the latest version:

 * If you use the OpenID Connect 8.x-1.x module, upgrade to OpenID Connect
   8.x-1.5 [3]

Updating OpenID Connect will not solve potential issues with existing
accounts affected by this bug. See Fixing emails that vary only by case [4]
for additional guidance.

Reported By: 
 * Eric Smith (ericgsmith) [5]

Fixed By: 
 * Philip Frilling (pfrilling) [6]

Coordinated By: 
 * Greg Knaddison (greggles) [7] of the Drupal Security Team
 * Drew Webber (mcdruid) [8] of the Drupal Security Team
 * Juraj Nemec (poker10) [9] of the Drupal Security Team

------------------------------------------------------------------------------
Contribution record [10]

[1] https://www.drupal.org/project/openid_connect
[2] https://www.drupal.org/security-team/risk-levels
[3] https://www.drupal.org/project/openid_connect/releases/8.x-1.5
[4] https://www.drupal.org/node/3486109
[5] https://www.drupal.org/u/ericgsmith
[6] https://www.drupal.org/u/pfrilling
[7] https://www.drupal.org/u/greggles
[8] https://www.drupal.org/u/mcdruid
[9] https://www.drupal.org/u/poker10
[10]  
https://new.drupal.org/contribution-record?source_link=https%3A//www.drupal.org/node/3577069

_______________________________________________
Security-news mailing list -- security-news AT drupal.org
To unsubscribe send an email to security-news-leave AT drupal.org
Unsubscribe at