# CVE-2026-87947: Drupal miniorange_saml signature algorithm verification bypass

Source: https://junglewise.ai/threats/cve-2026-87947-drupal-contrib-2026-145-this-module-allows-you-to-configure-your  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-22. Updated: 2026-09-26  
License: CC BY 4.0 with a link back

CVE-2026-87947 · Severity: info · Published 2026-10-22

The SAML SSO Service Provider module for Drupal allows external identity verification for user authentication. An attacker who can intercept or influence SAML responses can bypass signature validation by selecting the algorithm used to verify assertions, potentially gaining unauthorized access to user accounts or administrative functions. The attack requires the ability to submit a crafted SAML response to the affected Drupal site.

Technologies: [miniOrange SAML SSO - Service Provider](https://junglewise.ai/threats/technologies/miniorange-saml-sso-service-provider), [Packagist:Https://Packages.Drupal.Org/8 Drupal/Miniorange Saml](https://junglewise.ai/threats/technologies/drupal-miniorange-saml). Vendors: [miniOrange](https://junglewise.ai/threats/vendors/miniorange), [Packagist:Https://Packages.Drupal.Org/8](https://junglewise.ai/threats/vendors/packagist-https-packages-drupal-org-8).

## Quick answers

**Is CVE-2026-87947 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-87947 being exploited in the wild.

**How severe is CVE-2026-87947?** Informational severity, published 22 October 2026.

**Which products and versions are affected?** miniOrange SAML SSO - Service Provider before 3.2.0; Packagist:Https://Packages.Drupal.Org/8 Drupal/Miniorange Saml ECOSYSTEM:introduced=0,fixed=3.2.0.

**Is there a fix for CVE-2026-87947?** Yes. Packagist:Https://Packages.Drupal.Org/8 Drupal/Miniorange Saml: upgrade to 3.2.0 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-87947 attacked?** It is attacked over the network.

**Am I affected by CVE-2026-87947?** Check whether you run miniOrange SAML SSO - Service Provider or Packagist:Https://Packages.Drupal.Org/8 Drupal/Miniorange Saml at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- Packagist:Https://Packages.Drupal.Org/8 Drupal/Miniorange Saml: upgrade to 3.2.0 or later

## Technical details

The module fails to enforce a fixed signature algorithm for SAML assertion validation, instead allowing the algorithm to be specified in the incoming SAML response. This enables signature algorithm substitution attacks where an attacker crafts a response using a weaker or different algorithm than the IdP's configured key type expects. An attacker capable of submitting a malicious SAML response can exploit this to forge or replay assertions and achieve authentication bypass. The vulnerability is fixed in version 3.2.0.

## Affected products

- miniorange SAML SSO - Service Provider before 3.2.0

## Identifiers

- CVE-2026-87947
- DRUPAL-CONTRIB-2026-145

## Timeline

- 2026-09-09: disclosed

## References

- [https://www.drupal.org/u/timodc](https://www.drupal.org/u/timodc)
- [https://www.drupal.org/sa-contrib-2026-145](https://www.drupal.org/sa-contrib-2026-145)

## Related threats

- [miniorange_saml SAML Service Provider URL validation bypass](https://junglewise.ai/threats/cve-2026-87953-drupal-contrib-2026-151-this-module-allows-you-to-configure-your)
- [Authentication Bypass by Capture-replay vulnerability in Drupal SAML SSO - Service Provider allows Remote Services with Stolen Credentials.](https://junglewise.ai/threats/cve-2026-87952-drupal-contrib-2026-150-this-module-allows-you-to-configure-your)
- [Drupal SAML SSO Service Provider information disclosure in configuration storage](https://junglewise.ai/threats/cve-2026-87951-drupal-contrib-2026-149-this-module-allows-you-to-configure-your)
- [miniOrange SAML Service Provider embedded credentials information disclosure](https://junglewise.ai/threats/cve-2026-87950-drupal-contrib-2026-148-this-module-allows-you-to-configure-your)
- [SAML SSO Service Provider cross-site scripting in SAML assertion display](https://junglewise.ai/threats/cve-2026-87949-drupal-contrib-2026-147-this-module-allows-you-to-configure-your)