CVE-2026-109285 Open WebUI 0.6.0 before 0.11.4 Improper Access Control via Stale File Metadata
Former collaborators can access or delete files in private knowledge bases due to stale metadata, requiring an upgrade to Open WebUI.
- 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-2026-109285?
CVE-2026-109285 is a low-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 0.6.0 before 0.11.4 contains an improper access control vulnerability in has_access_to_file that lets former knowledge base collaborators keep file access via stale cached knowledge base references. Attackers with read or write grants can download removed files through the file content endpoint or delete them, including from the owner's private knowledge bases.
Weakness: CWE-863
Which versions are affected by CVE-2026-109285?
How do I fix CVE-2026-109285?
No fix has been published for CVE-2026-109285 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-2026-109285 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-109285 exists.
Sources
Also known as GHSA-7f6v-g89v-pwp7, GHSA-9cxp-636w-4997.