CVE-2026-45314

Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.9.3, the channel webhook create/update flow accepts arbitrary profile_image_url values, including data:image/svg+xml;base64,... payloads. The profile image endpoint then decodes and serves this SVG as image/svg+xml without sanitization, allowing attacker-controlled script handlers (for example onload) to execute when the profile-image URL is opened in the browser. This vulnerability is fixed in 0.9.3.

CVSS v3 6.1 MEDIUM

6.1^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 2.7

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact LOW

Integrity Impact LOW

Availability Impact NONE

Scope CHANGED

References

Link	Resource
https://github.com/open-webui/open-webui/security/advisories/GHSA-3856-3vxq-m6fc	Exploit Vendor Advisory
https://github.com/open-webui/open-webui/security/advisories/GHSA-3856-3vxq-m6fc	Exploit Vendor Advisory

Configurations

Configuration 1 (hide)

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

History

18 May 2026, 20:16

Type	Values Removed	Values Added
First Time		Openwebui Openwebui open Webui
CPE		cpe:2.3:a:openwebui:open_webui::::::::
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 6.1
References	~~() https://github.com/open-webui/open-webui/security/advisories/GHSA-3856-3vxq-m6fc -~~	() https://github.com/open-webui/open-webui/security/advisories/GHSA-3856-3vxq-m6fc - Exploit, Vendor Advisory

15 May 2026, 22:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-05-15 22:16

Updated : 2026-05-18 20:16

NVD link : CVE-2026-45314

Mitre link : CVE-2026-45314

CVE.ORG link : CVE-2026-45314

JSON object : View

Products Affected

openwebui

open_webui

CWE

CWE-87

Improper Neutralization of Alternate XSS Syntax

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