SAML SSO - Service Provider - Critical - Authentication bypass - SA-CONTRIB-2026-031
Project: SAML SSO - Service Provider Date: 2026-April-01Security risk: Critical 19 ∕ 25 AC:Complex/A:None/CI:All/II:All/E:Theoretical/TD:AllVulnerability: Authentication bypassAffected versions: <3.1.4CVE IDs: CVE-2026-5343Description: This module enables you to perform SAML-protocol-based single-sign-on (SSO) on a Drupal site.
The module doesn't sufficiently block access, leading to a authentication bypass vulnerability.Solution: Install the latest version:
If you are using the SAML SSO - Service Provider module for Drupal, upgrade to SAML SSO - Service Provider 3.1.4.Reported By:
Fixed By:
Coordinated By:
- Damien McKenna (damienmckenna) of the Drupal Security Team
- Greg Knaddison (greggles) of the Drupal Security Team
- Juraj Nemec (poker10) of the Drupal Security Team
- Jess (xjm) of the Drupal Security Team

