CVE-2026-56400 — open-webui - Remote Code Execution via CORS Misconfiguration and Session Validation
open-webui before 0.3.14 contains a cross-origin resource sharing misconfiguration allowing arbitrary origins with allow_origins=* and authenticated requests to the /api/v1/func…
Published: 2026-07-15 · CVSS: 9.0 · CVSS 4.0
open-webui before 0.3.14 contains a cross-origin resource sharing misconfiguration allowing arbitrary origins with allow_origins=* and authenticated requests to the /api/v1/functions endpoint. Attackers can execute arbitrary code on the openwebui instance by crafting malicious cross-site requests from attacker-controlled websites when an admin user visits them.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7