CVE-2026-13239 WissKI - Critical - Access bypass - SA-CONTRIB-2026-059
Attackers can bypass authorization controls in the Drupal WissKI module to access restricted resources via forceful browsing.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-13239?
CVE-2026-13239 is a medium-severity missing authorization vulnerability in Drupal WissKI, published on 10 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Missing Authorization vulnerability in Drupal WissKI allows Forceful Browsing. This issue affects WissKI versions: from 0.0.0 to 4.2.0.
Weakness: CWE-862
Which versions are affected by CVE-2026-13239?
It affects 1 product.
Linux distribution packages (1)
drupal/wisski Packagist:https://packages.drupal.org/8 | All versions | 4.2.0 |
Products include Wiss-Ki Wisski.
How do I fix CVE-2026-13239?
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-2026-13239 being exploited?
There is no known exploitation of CVE-2026-13239 in the wild and no public exploit code.
Sources
Also known as DRUPAL-CONTRIB-2026-059, GHSA-8375-8mwf-6r6x.