CVE-2026-54007

Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.9.6, the chat message listener allows non-same-origin input:prompt and action:submit messages, so an external site can set prompt text and trigger submitPrompt() in an authenticated victim session. I validated this with a cross-origin attacker page that auto-posted messages and caused unauthorized POST /api/v1/chats/new and POST /api/chat/completions requests containing attacker-controlled prompts. This enables cross-site forced actions and model/tool execution under victim privileges without consent. This vulnerability is fixed in 0.9.6.

CVSS v3 6.5 MEDIUM

6.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact HIGH

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/open-webui/open-webui/security/advisories/GHSA-3vv5-8xxp-4f55	Exploit Vendor Advisory
https://github.com/open-webui/open-webui/security/advisories/GHSA-3vv5-8xxp-4f55	Exploit Vendor Advisory

Configurations

Configuration 1 (hide)

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

History

26 Jun 2026, 20:17

Type	Values Removed	Values Added
References	~~() https://github.com/open-webui/open-webui/security/advisories/GHSA-3vv5-8xxp-4f55 - Exploit, Vendor Advisory~~	() https://github.com/open-webui/open-webui/security/advisories/GHSA-3vv5-8xxp-4f55 - Exploit, Vendor Advisory

25 Jun 2026, 13:40

Type	Values Removed	Values Added
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 6.5
First Time		Openwebui open Webui Openwebui
References	~~() https://github.com/open-webui/open-webui/security/advisories/GHSA-3vv5-8xxp-4f55 -~~	() https://github.com/open-webui/open-webui/security/advisories/GHSA-3vv5-8xxp-4f55 - Exploit, Vendor Advisory
CPE		cpe:2.3:a:openwebui:open_webui::::::::

23 Jun 2026, 18:18

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-06-23 18:18

Updated : 2026-06-26 20:17

NVD link : CVE-2026-54007

Mitre link : CVE-2026-54007

CVE.ORG link : CVE-2026-54007

JSON object : View

Products Affected

openwebui

open_webui

CWE

CWE-346

Origin Validation Error

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