[IT-SecNots] [Security-news] Mermaid Diagram Field - Moderately critical - Access bypass - SA-CONTRIB-2026-180

[security-news AT drupal.org]

View online: https://www.drupal.org/sa-contrib-2026-180

Project: Mermaid Diagram Field [1]
Project machine name: mermaid_diagram_field
Date: 2026-September-23
Security risk: *Moderately critical* 13 ∕ 25
AC:None/A:User/CI:Some/II:None/E:Theoretical/TD:All [2]
Vulnerability: Access bypass

Affected versions: >=1.0.4 <1.0.9
CVE IDs: CVE-2026-96384
Description: 
This module enables you to add mermaid diagram that displays either inline on
an entity or optionally in a modal.

The module doesn't sufficiently respect default revision behavior and does
not properly limit access to the modal content.

This vulnerability is mitigated by the fact that an attacker must have the
modal display option enabled for the field, or otherwise know the route of
the modal and entity ID.

Solution: 
Install the latest version:

 * If you use the Mermaid Diagram Field module, upgrade to Mermaid Diagram
   Field 1.0.10 [3].

Reported By: 
 * Marcus Johansson (marcus_johansson) [4]

Fixed By: 
 * Steve Wirt (swirt) [5]

Coordinated By: 
 * Swan Kalata (akalata) [6] of the Drupal Security Team
 * Greg Knaddison (greggles) [7] of the Drupal Security Team
 * Juraj Nemec (poker10) [8] of the Drupal Security Team
 * Jess  (xjm) [9] of the Drupal Security Team

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Contribution record [10]

[1] https://www.drupal.org/project/mermaid_diagram_field
[2] https://www.drupal.org/security-team/risk-levels
[3] https://www.drupal.org/project/mermaid_diagram_field/releases/1.0.10
[4] https://www.drupal.org/u/marcus_johansson
[5] https://www.drupal.org/u/swirt
[6] https://www.drupal.org/u/akalata
[7] https://www.drupal.org/u/greggles
[8] https://www.drupal.org/u/poker10
[9] https://www.drupal.org/u/xjm
[10]  
https://new.drupal.org/contribution-record?source_link=https%3A//www.drupal.org/node/3620537

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