CVE-2026-85693 Chatbot UI Cross-User Private File Content Disclosure via Retrieval API
Authenticated attackers can access private file content of other users by exploiting an authorization bypass in the retrieval API.
- 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-2026-85693?
CVE-2026-85693 is a high-severity missing authorization vulnerability in mckaywrigley chatbot-ui, published on 4 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Chatbot UI contains an authorization bypass vulnerability in the retrieval endpoint that allows authenticated attackers to access private file content belonging to other users by supplying arbitrary file UUIDs. The endpoint uses a service-role Supabase client that bypasses row-level security and fails to validate file ownership, enabling attackers to retrieve indexed content chunks from victim files through crafted POST requests.
Weakness: CWE-639
Which versions are affected by CVE-2026-85693?
How do I fix CVE-2026-85693?
No fix has been published for CVE-2026-85693 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-2026-85693 being exploited?
There is no known exploitation of CVE-2026-85693 in the wild and no public exploit code.
Sources
Also known as GHSA-258v-w87q-m5c9.