CVE-2026-56400

High

Description

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.

SeverityHigh

CVSS8.3

Exploit probability—

ProductOpenwebui Open Webui

PublishedJul 15, 2026

First seenJul 15, 2026

Weakness typeCWE-613CWE-613

How to fix

Update

openwebui open_webui0.3.14 or later
open-webui0.3.33 or later

Vendor advisories

github.com/open-webui/open-webui/security/advisories/GHSA-6xcp-7mpr-m7wm

Affected products

Product	Affected versions	Fixed in
openwebui open_webui	v < 0.3.14	0.3.14
open-webuiPyPI	v < 0.3.33	0.3.33

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