CVE-2026-59214: Openwebui Open Webui

Critical severity, CVSS 9.0. EPSS: 0.4% chance of exploitation in the next 30 days.

Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. Prior to 0.10.0, Open WebUI runs client-side Python with Pyodide in a same-origin web worker, allowing stored chat payloads that use pyodide.http.pyfetch or the js module fetch and XMLHttpRequest APIs to issue authenticated same-origin requests when a victim clicks Run, which can reach admin-only endpoints and execute server-side code through configured tools. This issue is fixed in version 0.10.0.

Affected products

• Openwebui Open Webui: before 0.10.0 (fixed in 0.10.0)

Published 2026-07-09. Last modified 2026-07-10.