CVE-2026-109287 Open WebUI 0.9.6 before 0.11.4 Information Disclosure via Unscoped Directory ID
Attackers with read access to any knowledge base can expose folder names and owner IDs of other directories by supplying foreign directory IDs.
- 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-2026-109287?
CVE-2026-109287 is a medium-severity missing authorization vulnerability in open-webui, published on 12 Oct 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Open WebUI from 0.9.6 before 0.11.4 contains an authorization flaw where the knowledge base file listing does not verify that a supplied directory_id belongs to the requested knowledge base. Users with read access to any knowledge base can supply a retained foreign directory UUID to GET /api/v1/knowledge/{id}/files. The returned breadcrumbs expose folder names, owner user ids and knowledge base ids of that directory and all its ancestors.
Which versions are affected by CVE-2026-109287?
How do I fix CVE-2026-109287?
No fix has been published for CVE-2026-109287 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-2026-109287 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-109287 exists.
Sources
Also known as GHSA-jx3w-3pqq-7f3w, GHSA-qrjc-r6jg-4w9f.