CVE-2026-45301: Openwebui Open Webui

High severity, CVSS 8.1. EPSS: 0.4% chance of exploitation in the next 30 days.

Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.3.16, a missing permission check in all files related API endpoints allows any authenticated user to list, access and delete every file uploaded by every user to the platform. This vulnerability is fixed in 0.3.16.

Affected products

• Openwebui Open Webui: before 0.3.16 (fixed in 0.3.16)

Published 2026-05-15. Last modified 2026-06-17.