CVE-2026-45400: Openwebui Open Webui

High severity, CVSS 8.5. 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 0.9.5, a parsing difference between the urlparse and requests libraries led to an SSRF bypass vulnerability. This vulnerability is fixed in 0.9.5.

Affected products

• Openwebui Open Webui: before 0.9.5 (fixed in 0.9.5)

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