CVE-2026-73478 Diff - Moderately critical - Access bypass - SA-CONTRIB-2026-096
Attackers can bypass authorization checks to access restricted content in the Drupal Diff module, requiring an upgrade to secure the site.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-73478?
CVE-2026-73478 is a medium-severity missing authorization vulnerability in Drupal Diff, published on 2 Sep 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 Diff allows Forceful Browsing. This issue affects Diff versions: from 0.0.0 to 2.0.1, from 2.1.0 to 2.1.1.
Weakness: CWE-863
Which versions are affected by CVE-2026-73478?
It affects 1 product.
Linux distribution packages (1)
drupal/diff Packagist:https://packages.drupal.org/8 | All versions | 2.0.1, 2.1.1 |
Products include Diff Project Diff.
How do I fix CVE-2026-73478?
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-2026-73478 being exploited?
There is no known exploitation of CVE-2026-73478 in the wild and no public exploit code.
Other vulnerabilities in Drupal Diff
Sources
Also known as DRUPAL-CONTRIB-2026-096, GHSA-ghfg-j64w-r9hj.