[IT-SecNots] [Security-news] Quick Tabs - Moderately critical - Access bypass - SA-CONTRIB-2026-099

[security-news AT drupal.org]

View online: https://www.drupal.org/sa-contrib-2026-099

Project: Quick Tabs [1]
Date: 2026-August-12
Security risk: *Moderately critical* 13 ∕ 25
AC:None/A:None/CI:Some/II:None/E:Theoretical/TD:Uncommon [2]
Vulnerability: Access bypass

Affected versions: <4.3.1
CVE IDs: CVE-2026-73477
Description: 
This module enables you to display content in tabs, where each tab renders a
block, a node, a view, or another Quick Tabs instance.

The module did not correctly enforce access when rendering node and block
tabs. It treated a neutral access result as a grant for node tabs and block
plugins, and performed no access check for reusable custom blocks. Content
that should have been denied was therefore rendered — for example, an
unpublished node or unpublished reusable custom block could be shown to users
without permission to view it.

The access bypass is mitigated by the fact that affected content is selected
by a user with the “administer quicktabs” permission when the tab is
configured, so an attacker cannot choose which content is exposed.

Solution: 
Install the latest version:

 * If you use the Quick Tabs module for Drupal, upgrade to Quick Tabs 4.3.1
   [3]

Reported By: 
 * Joël Pittet (joelpittet) [4]

Fixed By: 
 * Joël Pittet (joelpittet) [5]

Coordinated By: 
 * Swan Kalata (akalata) [6] of the Drupal Security Team
 * Neil Drumm (drumm) [7] of the Drupal Security Team
 * Greg Knaddison (greggles) [8] of the Drupal Security Team

------------------------------------------------------------------------------
Contribution record [9]

[1] https://www.drupal.org/project/quicktabs
[2] https://www.drupal.org/security-team/risk-levels
[3] https://www.drupal.org/project/quicktabs/releases/4.3.1
[4] https://www.drupal.org/u/joelpittet
[5] https://www.drupal.org/u/joelpittet
[6] https://www.drupal.org/u/akalata
[7] https://www.drupal.org/u/drumm
[8] https://www.drupal.org/u/greggles
[9]  
https://new.drupal.org/contribution-record?source_link=https%3A//www.drupal.org/node/3614950

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