[IT-SecNots] [Security-news] Webform - Less critical - Access bypass - SA-CONTRIB-2026-165

[security-news AT drupal.org]

View online: https://www.drupal.org/sa-contrib-2026-165

Project: Webform [1]
Project machine name: webform
Date: 2026-September-23
Security risk: *Less critical* 8 ∕ 25
AC:Complex/A:User/CI:Some/II:None/E:Theoretical/TD:Uncommon [2]
Vulnerability: Access bypass

Affected versions: <6.2.12 || >=6.3.0 <6.3.1
CVE IDs: CVE-2026-96369
Description: 
The Webform module allows site builders to create forms, collect submissions,
and configure access to forms and submission data.

When Webform is used with JSON:API enabled, submissions may be cached without
varying correctly by the authenticated user. If a webform is configured so
that authenticated users can view their own submissions, a request to the
JSON:API webform submission collection can return a cached response generated
for a different user.

This can allow an authenticated user to view another user's webform
submission data through the JSON:API collection endpoint.

This vulnerability is mitigated by the fact that JSON:API must be enabled,
the affected webform must expose submissions through JSON:API, and the
attacker must have an account with permission to view their own submissions
for the affected webform.

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: 
 * Giuseppe  (giuseppe87) [5]

Fixed By: 
 * Damien McKenna (damienmckenna) [6] of the Drupal Security Team
 * Jacob Rockowitz (jrockowitz) [7]
 * Lee Rowlands (larowlan) [8] of the Drupal Security Team

Coordinated By: 
 * Swan Kalata (akalata) [9] of the Drupal Security Team
 * Bram Driesen (bramdriesen) [10] of the Drupal Security Team
 * Greg Knaddison (greggles) [11] of the Drupal Security Team
 * Jacob Rockowitz (jrockowitz) [12]
 * Juraj Nemec (poker10) [13] of the Drupal Security Team

------------------------------------------------------------------------------
Contribution record [14]

[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/giuseppe87
[6] https://www.drupal.org/u/damienmckenna
[7] https://www.drupal.org/u/jrockowitz
[8] https://www.drupal.org/u/larowlan
[9] https://www.drupal.org/u/akalata
[10] https://www.drupal.org/u/bramdriesen
[11] https://www.drupal.org/u/greggles
[12] https://www.drupal.org/u/jrockowitz
[13] https://www.drupal.org/u/poker10
[14]  
https://new.drupal.org/contribution-record?source_link=https%3A//www.drupal.org/node/3611229

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