CVE-2026-87946
SAML SSO - Service Provider - Critical - Weak cryptographic practices - SA-CONTRIB-2026-144
Observable Timing Discrepancy vulnerability in Drupal SAML SSO - Service Provider allows Brute Force. This issue affects SAML SSO - Service Provider versions: from 0.0.0 to 3.2.0.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- High
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- Low
- Integrity
- Low
- Availability
- None
Exploit likelihood
What each source reports
CVE List Score used
SAML SSO - Service Provider - Critical - Weak cryptographic practices - SA-CONTRIB-2026-144
Observable Timing Discrepancy vulnerability in Drupal SAML SSO - Service Provider allows Brute Force. This issue affects SAML SSO - Service Provider versions: from 0.0.0 to 3.2.0.
- Record
CVE-2026-87946- CVSS 3.1
- 4.8 Medium
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N - Weakness
- CWE-208
- Updated
- 2026-11-02
EUVDEUVD-2026-107855
Observable Timing Discrepancy vulnerability in Drupal SAML SSO - Service Provider allows Brute Force. This issue affects SAML SSO - Service Provider versions: from 0.0.0 to 3.2.0.
- Record
EUVD-2026-107855- CVSS 3.1
- 4.8 Medium
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-rcqp-4hgq-whp9
Observable Timing Discrepancy vulnerability in Drupal SAML SSO - Service Provider allows Brute...
Observable Timing Discrepancy vulnerability in Drupal SAML SSO - Service Provider allows Brute Force. This issue affects SAML SSO - Service Provider versions: from 0.0.0 to 3.2.0.
- Record
GHSA-rcqp-4hgq-whp9- CVSS 3.1
- 4.8 Medium
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N - Weakness
- CWE-208
- Updated
- 2026-11-02
NVD
Observable Timing Discrepancy vulnerability in Drupal SAML SSO - Service Provider allows Brute Force. This issue affects SAML SSO - Service Provider versions: from 0.0.0 to 3.2.0.
- Record
CVE-2026-87946- CVSS 3.1
- 4.8 Medium
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N - Weakness
- CWE-208
- Updated
- 2026-11-02
OSV
SAML SSO - Service Provider - Critical - Weak cryptographic practices - SA-CONTRIB-2026-144
Observable Timing Discrepancy vulnerability in Drupal SAML SSO - Service Provider allows Brute Force. This issue affects SAML SSO - Service Provider versions: from 0.0.0 to 3.2.0.
- Record
CVE-2026-87946- CVSS 3.1
- 4.8 Medium
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N - Weakness
- CWE-208
- Updated
- 2026-11-02
OSVDRUPAL-CONTRIB-2026-144 No score
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 uses cryptographic constructions that do not align with current security best practices.
The module performs certain signature comparisons using non constant-time comparison logic and generates SAML request identifiers using predictable values derived from non-cryptographic random number generation.
While no practical authentication bypass has been demonstrated as a result of these weaknesses alone, they may reduce the overall security margin of SAML authentication workflows.
- Record
DRUPAL-CONTRIB-2026-144- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
drupal/miniorange_samlPackagist:https://packages.drupal.org/8 |
before 3.2.0 | 3.2.0 |
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | CVE List, EUVD, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2026-87946 is a medium vulnerability (CVSS 4.8) in Drupal Saml Sso - Service Provider, published September 9, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.22%, the 13th percentile. Fixed in drupal/miniorange_saml 3.2.0.