[IT-SecNots] [Security-news] Webform - Moderately critical - Cross-site scripting - SA-CONTRIB-2026-172

[security-news AT drupal.org]

View online: https://www.drupal.org/sa-contrib-2026-172

Project: Webform [1]
Project machine name: webform
Date: 2026-September-23
Security risk: *Moderately critical* 13 ∕ 25
AC:Basic/A:User/CI:Some/II:Some/E:Theoretical/TD:Default [2]
Vulnerability: Cross-site scripting

Affected versions: <6.2.12 || >=6.3.0 <6.3.1
CVE IDs: CVE-2026-96357
Description: 
The Webform module allows site builders to create forms, collect submissions,
and configure access to forms and submission data. Form submissions may
include uploaded files.

The module does not sufficiently force certain uploaded file types to
download when served. Under certan site configurations, a file uploaded
through a webform could be rendered inline by a browser, resulting in a
cross-site scripting vulnerability.

This vulnerability is mitigated by the fact that a user with permission to
create or edit webforms must configure the form to allow the affected file
extensions, and a user must specifically open the uploaded file.

Solution: 
Install the latest version:

 * If you use the 6.2.x branch of Webform upgrade to Webform 6.2.12 [3].
 * If you use the 6.3.x branch of Webform, upgrade to Webform 6.3.1 [4].

Reported By: 
 * Michael Maturi (michaelmaturi) [5]

Fixed By: 
 * Jacob Rockowitz (jrockowitz) [6]
 * Lee Rowlands (larowlan) [7] of the Drupal Security Team

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

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

[1] https://www.drupal.org/project/webform
[2] https://www.drupal.org/security-team/risk-levels
[3] https://www.drupal.org/project/webform/releases/6.2.12
[4] https://www.drupal.org/project/webform/releases/6.3.1
[5] https://www.drupal.org/u/michaelmaturi
[6] https://www.drupal.org/u/jrockowitz
[7] https://www.drupal.org/u/larowlan
[8] https://www.drupal.org/u/akalata
[9] https://www.drupal.org/u/bramdriesen
[10] https://www.drupal.org/u/greggles
[11] https://www.drupal.org/u/xjm
[12]  
https://new.drupal.org/contribution-record?source_link=https%3A//www.drupal.org/node/3598060

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