CVE-2026-54013

Open WebUI: Stored XSS to Account Takeover via Model Profile Images in Open WebUI

State: Published
Severity: 7.6 High
Published: Jun 23, 2026
Updated: Jun 26, 2026
Reserved: Jun 11, 2026

Description

Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.9.6, Open WebUI patched SVG XSS in user profile images and webhook profile images but forgot to apply the same fix to model profile images. The ModelMeta class has no validate_profile_image_url field validator, and the model image serving endpoint has no MIME allowlist or nosniff header. Any authenticated user with workspace.models permission (enabled by default) can store a data:image/svg+xml;base64,... payload in a model's profile image and achieve full account takeover of anyone who navigates to the image URL. This vulnerability is fixed in 0.9.6.

Scores

CVSS	Score	Vector	Source
3.1	7.6 High	CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:N	GitHub_M

Weaknesses

CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CWE-116 Improper Encoding or Escaping of Output
CWE-693 Protection Mechanism Failure

Affected Products

Product	Versions
open-webuiopen-webui	< 0.9.6Affected

References

https://github.com/open-webui/open-webui/security/advisories/GHSA-v2qm-5wxj-qhj7

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