drupal/webform - SA-CONTRIB-2026-165
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.
Affected software
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| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Composer package | drupal/webform | < 6.2.12, >= 6.3.0, < 6.3.1 | 6.2.12, 6.3.1 |
| Drupal module | drupal/webform | < 6.2.12, >= 6.3.0, < 6.3.1 | 6.2.12, 6.3.1 |
References
- Weakness (CWE)
-- Platform
- Composer, Drupal
- Package
drupal/webform- Disclosed
- 23.09.2026
- Updated
- 11.10.2026 13:17
Sources and licenses
OSV / GitHub Advisory Database - DRUPAL-CONTRIB-2026-165 - CC BY-SA 2.0; code GPL-2.0-or-later
Vulnerability history: drupal/webform
All published vulnerabilities of this package (Composer package), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 31
- First → latest
- 05.2020 09.2026
- Without a fix
- 0
- Exploited in attacks
- 0
Severity breakdown
- Unrated 31
Disclosures per year
- 2020: 8
- 2021: 3
- 2022: 0
- 2023: 0
- 2024: 0
- 2025: 0
- 2026: 20
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