CVE-2026-109285 [MEDIUM] – Open WebUI from 0.6.0 before 0.11.4 contains an improper access control vulnerability in h

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.