CVE-2026-85693: Chatbot UI Cross-User Private File Content Disclosure via Retrieval API
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.
Affected Software
Event History
Frequently Asked Questions
Who can exploit this issue?
Any authenticated Chatbot UI user can exploit it. The attacker needs to submit crafted POST requests to the retrieval endpoint with UUIDs for files owned by other users.
What information can an attacker obtain?
An attacker can retrieve indexed content chunks from other users' private files. The issue affects confidentiality; no integrity or availability impact is described.
Does row-level security protect against this endpoint?
No. The endpoint uses a service-role Supabase client, which bypasses row-level security, and it does not validate that the requested file belongs to the authenticated user.