CVE-2026-45345: Openwebui Open Webui

Medium severity, CVSS 6.5. EPSS: 0.3% chance of exploitation in the next 30 days.

Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.5.7, a user can modify another user's model even if its visibility is set to Private. By changing the access permissions during editing, unauthorized access can be gained. This vulnerability is fixed in 0.5.7.

Affected products

• Openwebui Open Webui: before 0.5.7 (fixed in 0.5.7)

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