CVE-2026-56400

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.

CVSS v3 8.3 HIGH

8.3^/10

CVSS v3 : HIGH

Vector :

Exploitability : 1.6 / Impact : 6.0

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope CHANGED

References

Link	Resource
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	Exploit Third Party Advisory
https://github.com/open-webui/open-webui/security/advisories/GHSA-6xcp-7mpr-m7wm	Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:openwebui:open_webui:*:*:*:*:*:*:*:*

History

16 Jul 2026, 20:03

Type	Values Removed	Values Added
CPE		cpe:2.3:a:openwebui:open_webui::::::::
References	~~() https://github.com/open-webui/open-webui/security/advisories/GHSA-6xcp-7mpr-m7wm -~~	() https://github.com/open-webui/open-webui/security/advisories/GHSA-6xcp-7mpr-m7wm - Vendor Advisory
References	~~() https://www.vulncheck.com/advisories/open-webui-remote-code-execution-via-cors-misconfiguration-and-session-validation -~~	() https://www.vulncheck.com/advisories/open-webui-remote-code-execution-via-cors-misconfiguration-and-session-validation - Exploit, Third Party Advisory
First Time		Openwebui open Webui Openwebui

15 Jul 2026, 19:18

Type	Values Removed	Values Added
References	~~() https://github.com/open-webui/open-webui/security/advisories/GHSA-6xcp-7mpr-m7wm -~~	() https://github.com/open-webui/open-webui/security/advisories/GHSA-6xcp-7mpr-m7wm -

15 Jul 2026, 12:18

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-07-15 12:18

Updated : 2026-07-16 20:03

NVD link : CVE-2026-56400

Mitre link : CVE-2026-56400

CVE.ORG link : CVE-2026-56400

JSON object : View

Products Affected

openwebui

open_webui

CWE

CWE-613

Insufficient Session Expiration

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