[IT-SecNots] [Security-news] OpenID Connect / OAuth client - Moderately critical - Access bypass - SA-CONTRIB-2026-026

[security-news AT drupal.org]

View online: https://www.drupal.org/sa-contrib-2026-026

Project: OpenID Connect / OAuth client [1]
Date: 2026-March-04
Security risk: *Moderately critical* 10 ∕ 25
AC:Complex/A:User/CI:Some/II:None/E:Theoretical/TD:All [2]
Vulnerability: Access bypass

Affected versions: <1.5.0
CVE IDs: CVE-2026-3531
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.

A visitor who successfully logs in to their Identity Provider and is denied
access to Drupal through custom code or a server error will maintain their
session at the Identity Provider, possibly leading to access bypass
situations, especially in a shared computing environment.

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]

Reported By: 
 * Kimberley Massey (kimberleycgm) [4]

Fixed By: 
 * Kimberley Massey (kimberleycgm) [5]
 * Philip Frilling (pfrilling) [6]

Coordinated By: 
 * Damien McKenna (damienmckenna) [7] of the Drupal Security Team
 * Greg Knaddison (greggles) [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/u/kimberleycgm
[5] https://www.drupal.org/u/kimberleycgm
[6] https://www.drupal.org/u/pfrilling
[7] https://www.drupal.org/u/damienmckenna
[8] https://www.drupal.org/u/greggles
[9] https://www.drupal.org/u/poker10
[10]  
https://new.drupal.org/contribution-record?source_link=https%3A//www.drupal.org/node/3577066

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