View online: https://www.drupal.org/sa-contrib-2026-284 Project: OAuth Login - OAuth OIDC SSO [1] Project machine name: oauth_login_oauth2 Date: 2026-October-28 Security risk: *Critical* 15 ∕ 25 AC:Complex/A:None/CI:Some/II:Some/E:Theoretical/TD:All [2] Vulnerability: Authentication bypass Affected versions: <3.1.1 CVE IDs: CVE-2026-118572 Description: This module enables you to log in to your Drupal site using any OAuth 2.0 or OpenID Connect compliant identity provider. The module doesn't sufficiently check access on a configuration route, or check whether the identity provider has verified the email address it returns. Together, these let an attacker log in as any existing user whose email address they know. This vulnerability is mitigated by the fact that an attacker must have an account with an identity provider the site is configured to use. They must also be able to set the value of at least one attribute that provider returns, such as a username. Solution: Install the latest version: * If you use the OAuth Login - OAuth OIDC SSO module, upgrade to OAuth Login - OAuth OIDC SSO-3.1.1 [3]. Reported By: * Sanjeev Kumar (ksanjeev284) [4] Fixed By: * Akash khairnar (khairnarakash) [5] * Neetu Choudhary (neetu01) [6] * purva_shende [7] Coordinated By: * Swan Kalata (akalata) [8] of the Drupal Security Team * Greg Knaddison (greggles) [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/oauth_login_oauth2 [2] https://www.drupal.org/drupal-security-team/security-risk-levels-defined [3] https://www.drupal.org/project/oauth_login_oauth2/releases/3.1.1 [4] https://www.drupal.org/u/ksanjeev284 [5] https://www.drupal.org/u/khairnarakash [6] https://www.drupal.org/u/neetu01 [7] https://www.drupal.org/u/purva_shende [8] https://www.drupal.org/u/akalata [9] https://www.drupal.org/u/greggles [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....