CVE-2026-59214 — Open WebUI: Stored web worker XSS via Pyodide

CVE-2026-59214

Open WebUI: Stored web worker XSS via Pyodide PUBLISHED

Description (CNA)

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 (CNA)

Vendor / product	Versions
open-webui / open-webui	affected < 0.10.0

CWE

CWE-79

References

https://github.com/open-webui/open-webui/security/advisories/GHSA-4r2p-27mh-5m22

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.