[IT-SecNots] [Security-news] Webform - Less critical - Denial of service - SA-CONTRIB-2026-170

[security-news AT drupal.org]

View online: https://www.drupal.org/sa-contrib-2026-170

Project: Webform [1]
Project machine name: webform
Date: 2026-September-23
Security risk: *Less critical* 8 ∕ 25
AC:Basic/A:None/CI:None/II:None/E:Theoretical/TD:Uncommon [2]
Vulnerability: Denial of service

Affected versions: <6.2.12 || >=6.3.0 <6.3.1
CVE IDs: CVE-2026-96365
Description: 
The Webform module allows site builders to create forms, collect submissions,
and configure access to forms and submission data. Site builders may also
configure handlers for processing submissions. Forms may be displayed in
blocks.

Webform does not sufficiently validate an optional token query value before
using it. Under specific configurations where a Webform is rendered for
anonymous visitors, a malicious request can cause the request to consume
significant resources leading to a Denial of Service.

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: 
 * Majdi Alomari (majdi) [5]

Fixed By: 
 * Jacob Rockowitz (jrockowitz) [6]
 * Liam Morland (liam morland) [7]

Coordinated By: 
 * Swan Kalata (akalata) [8] of the Drupal Security Team
 * Bram Driesen (bramdriesen) [9] of the Drupal Security Team
 * cilefen  (cilefen) [10] of the Drupal Security Team
 * Damien McKenna (damienmckenna) [11] of the Drupal Security Team
 * Greg Knaddison (greggles) [12] of the Drupal Security Team
 * Ivo  Van Geertruyen (mr.baileys) [13] of the Drupal Security Team
 * Jess  (xjm) [14] of the Drupal Security Team

------------------------------------------------------------------------------
Contribution record [15]

[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/majdi
[6] https://www.drupal.org/u/jrockowitz
[7] https://www.drupal.org/u/liam-morland
[8] https://www.drupal.org/u/akalata
[9] https://www.drupal.org/u/bramdriesen
[10] https://www.drupal.org/u/cilefen
[11] https://www.drupal.org/u/damienmckenna
[12] https://www.drupal.org/u/greggles
[13] https://www.drupal.org/u/mrbaileys
[14] https://www.drupal.org/u/xjm
[15]  
https://new.drupal.org/contribution-record?source_link=https%3A//www.drupal.org/node/3611210

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