CVE-2026-56400 · Symaro Security Advisory

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.

Severity (CVSS)

Base score	9
Severity	Critical
Version	CVSS 4.0
Vector	CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
Provided by	CNA

Weaknesses

CWE-613 — Insufficient Session Expiration

Affected products

Vendor	Product	Versions
open-webui	open-webui	0 to <0.3.14; 0.3.14

References

https://github.com/open-webui/open-webui/security/advisories/GHSA-6xcp-7mpr-m7wm (vendor-advisory)
https://www.vulncheck.com/advisories/open-webui-remote-code-execution-via-cors-misconfiguration-and-session-validation (third-party-advisory)

Authoritative sources

This page is a snapshot. For the latest enrichment and updates, view the record on CVE.org or the NVD.

Generated from the official CVE List on 16 Jul 2026 07:01 UTC.