CVE-2026-89257 AVideo through 29.0 Cross-User Category Asset Deletion via Missing Ownership Check
Authenticated users can delete arbitrary category assets due to missing ownership checks, requiring non-default configuration.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-89257?
CVE-2026-89257 is a medium-severity missing authorization vulnerability in WWBN AVideo, published on 11 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
AVideo through 29.0 contains an insecure direct object reference (IDOR) vulnerability in objects/categoryDeleteAssets.json.php. The endpoint validates only the Category::canCreateCategory() capability and a CSRF nonce before passing the attacker-supplied $_REQUEST['id'] to Category::deleteAssets(), which recursively removes {systemRootPath}videos/categories/assets/{id}/. It omits the Category::userCanEditCategory() ownership check enforced by the sibling Category::delete(). On installations where the non-default usersCanCreateNewCategories setting is enabled, an authenticated non-admin user with the canUpload capability can send a POST request with an arbitrary category ID and recursively delete any category's on-disk asset directory (icons/images). Category records and videos are not deleted. As of the advisory publication no patched version was available.
Weakness: CWE-639
Which versions are affected by CVE-2026-89257?
How do I fix CVE-2026-89257?
No fix has been published for CVE-2026-89257 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-89257 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-89257 exists.
Sources
Also known as GHSA-7r9w-g597-h25f, GHSA-gf2v-r8wx-ghqj.