Open WebUI — Vulnerability (CVE-2026-44568)
Date: 2026-05
Affected: openwebui/open_webui
Attack vector: xss
Category: vulnerability-disclosure
Severity: Medium
CVE: CVE-2026-44568
CWE: CWE-79
CVSS: 4.8 (CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N)

Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.9.0, the AccountPending.svelte component renders the admin-configured "Pending User Overlay Content" using marked.parse() inside {@html} with an incorrect DOMPurify application order. An admin can inject arbitrary JavaScript into the Pending User Overlay Content that executes in the browser context of any pending user who views the overlay page. This vulnerability is fixed in 0.9.0.


Mitigations:

Architectural layers (MAESTRO):