drupal/captcha - SA-CONTRIB-2026-015
This module enables you to protect web forms from automated spam by requiring users to pass a challenge.
The module doesn't sufficiently invalidate used security tokens under certain scenarios, which can lead to the CAPTCHA being bypassed on subsequent submissions.
This vulnerability is mitigated by the fact that an attacker must first successfully solve at least one CAPTCHA manually to harvest the valid tokens.
Affected software
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| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Composer package | drupal/captcha | < 1.17.0, >= 2.0.0, < 2.0.10 | 1.17.0, 2.0.10 |
| Drupal module | drupal/captcha | < 1.17.0, >= 2.0.0, < 2.0.10 | 1.17.0, 2.0.10 |
References
- Weakness (CWE)
-- Platform
- Composer, Drupal
- Package
drupal/captcha- Disclosed
- 25.02.2026
- Updated
- 11.10.2026 12:18
Sources and licenses
OSV / GitHub Advisory Database - DRUPAL-CONTRIB-2026-015 - CC BY-SA 2.0; code GPL-2.0-or-later
Vulnerability history: drupal/captcha
All published vulnerabilities of this package (Drupal module), newest first. Shows whether this is a one-off slip or a package that needs watching.
This is the only known vulnerability of this package.
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