SA-CONTRIB-2026-150: Critical severity drupal/miniorange_saml vulnerability
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.
Credit
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
drupal/miniorange_samlto a version that resolves this vulnerability.Fixed in 3.2.0
Event History
Frequently Asked Questions
What must an attacker obtain before exploiting this issue?
An attacker must first obtain a valid SAML assertion. The assertion can only be replayed during its validity period.
Who is exposed to the replay risk?
Drupal sites using the affected module as a SAML 2.0 Service Provider are exposed when a valid SAML assertion can be obtained and replayed before it expires.
How can defenders tell whether a replay may have occurred?
The provided information does not identify a specific detection method or log indicator. Review authentication activity for repeated attempts using the same valid SAML assertion within its validity period.