CVE-2026-16644 Webform REST - Moderately critical - Access bypass - SA-CONTRIB-2026-087
Attackers can bypass authorization checks to access restricted resources in the Drupal Webform REST module.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-16644?
CVE-2026-16644 is a critical missing authorization vulnerability in Drupal Webform REST, published on 25 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Incorrect Authorization vulnerability in Drupal Webform REST allows Forceful Browsing. This issue affects Webform REST versions: from 0.0.0 to 4.1.0.
Weakness: CWE-863
Which versions are affected by CVE-2026-16644?
Linux distribution packages (1)
drupal/webform_rest Packagist:https://packages.drupal.org/8 | All versions | 4.1.0 |
How do I fix CVE-2026-16644?
Upgrade to a fixed version.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-16644 being exploited?
There is no known exploitation of CVE-2026-16644 in the wild and no public exploit code.
Sources
Also known as DRUPAL-CONTRIB-2026-087, GHSA-6fwm-vrgx-rjw7.