[IT-SecNots] [Security-news] Combined image style - Moderately critical - Improper access control - SA-CONTRIB-2026-188

[security-news AT drupal.org]

View online: https://www.drupal.org/sa-contrib-2026-188

Project: Combined image style [1]
Project machine name: combined_image_style
Date: 2026-September-23
Security risk: *Moderately critical* 10 ∕ 25
AC:Basic/A:None/CI:None/II:None/E:Theoretical/TD:All [2]
Vulnerability: Improper access control

Affected versions: <1.0.7
CVE IDs: CVE-2026-96377
Description: 
This module enables you to combine multiple image styles into a single image
derivative.

The module does not sufficiently validate image style names when generating
image derivatives. Under certain circumstances, this allows anonymous users
to generate image derivatives without a valid token, potentially leading to a
denial of service.

Sites are affected simply by having the module installed, even when no
combined image styles are configured or in use.

This vulnerability is mitigated by the fact that only public files can be
targeted, and derivatives of private files are still protected by core's
token check.

Solution: 
Install the latest version:

 * If you use the Combined image style module, upgrade to Combined image
   style 1.0.7 [3].

Reported By: 
 * Sven Decabooter (svendecabooter) [4]

Fixed By: 
 * Sven Decabooter (svendecabooter) [5]
 * Swan Kalata (akalata) [6] of the Drupal Security Team

Coordinated By: 
 * Swan Kalata (akalata) [7] of the Drupal Security Team
 * Bram Driesen (bramdriesen) [8] of the Drupal Security Team
 * Greg Knaddison (greggles) [9] of the Drupal Security Team
 * Juraj Nemec (poker10) [10] of the Drupal Security Team
 * Jess  (xjm) [11] of the Drupal Security Team

------------------------------------------------------------------------------
Contribution record [12]

[1] https://www.drupal.org/project/combined_image_style
[2] https://www.drupal.org/security-team/risk-levels
[3] https://www.drupal.org/project/combined_image_style/releases/1.0.7
[4] https://www.drupal.org/u/svendecabooter
[5] https://www.drupal.org/u/svendecabooter
[6] https://www.drupal.org/u/akalata
[7] https://www.drupal.org/u/akalata
[8] https://www.drupal.org/u/bramdriesen
[9] https://www.drupal.org/u/greggles
[10] https://www.drupal.org/u/poker10
[11] https://www.drupal.org/u/xjm
[12]  
https://new.drupal.org/contribution-record?source_link=https%3A//www.drupal.org/node/3622942

_______________________________________________
Security-news mailing list -- security-news AT drupal.org
To unsubscribe send an email to security-news-leave AT drupal.org
Unsubscribe at