[IT-SecNots] [Security-news] SAML SSO - Service Provider - Moderately critical - Insufficient replay protection - SA-CONTRIB-2026-150

[security-news AT drupal.org]

View online: https://www.drupal.org/sa-contrib-2026-150

Project: SAML SSO - Service Provider  [1]
Date: 2026-September-09
Security risk: *Moderately critical* 10 ∕ 25
AC:Complex/A:User/CI:None/II:Some/E:Theoretical/TD:All [2]
Vulnerability: Insufficient replay protection

Affected versions: <3.2.0
CVE IDs: CVE-2026-87952
Description: 
This module allows you to configure your Drupal site as a SAML 2.0 Service
Provider so that users can authenticate through an external identity
provider.

The module does not sufficiently prevent reuse of previously accepted SAML
assertions. Under certain circumstances, a valid assertion may be replayed
within its validity period, potentially allowing repeated authentication
attempts using the same assertion.

This vulnerability is mitigated by the fact that an attacker must first
obtain a valid SAML assertion and can only reuse it during the assertion's
validity period.

Solution: 
Install the latest version:

 * Upgrade to miniorange_saml 3.2.0 [3].

Reported By: 
 * Brian Willows (hsjbrianwillows) [4]

Fixed By: 
 * Roushan Kumar Singh (roushan59227) [5]
 * Sudhanshu Dhage (sudhanshu0542) [6]

Coordinated By: 
 * Bram Driesen (bramdriesen) [7] of the Drupal Security Team
 * Greg Knaddison (greggles) [8] of the Drupal Security Team
 * Juraj Nemec (poker10) [9] of the Drupal Security Team
 * Jess  (xjm) [10] of the Drupal Security Team
 * Swan Kalata (akalata) [11] of the Drupal Security Team

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

[1] https://www.drupal.org/project/miniorange_saml
[2] https://www.drupal.org/security-team/risk-levels
[3] https://www.drupal.org/project/miniorange_saml/releases/3.2.0
[4] https://www.drupal.org/u/hsjbrianwillows
[5] https://www.drupal.org/u/roushan59227
[6] https://www.drupal.org/u/sudhanshu0542
[7] https://www.drupal.org/u/bramdriesen
[8] https://www.drupal.org/u/greggles
[9] https://www.drupal.org/u/poker10
[10] https://www.drupal.org/u/xjm
[11] https://www.drupal.org/u/akalata
[12]  
https://new.drupal.org/contribution-record?source_link=https%3A//www.drupal.org/node/3621927

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