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Medium · 4.8 CVE-2026-44568 EUVD-2026-30610GHSA-fq3v-xjjx-95rcPYSEC-2026-2724

Open WebUI: Stored XSS in Pending User Overlay via Incorrect DOMPurify Application Order

Published May 15, 2026 · Updated May 15, 2026 · Assigned by GitHub_M

Description

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.

Affected products

VendorProductAffectedFixed
open-webui open-webui < 0.9.0 —

Affected packages

EcosystemPackageAffectedFixedRecord
PyPI open-webui < 0.9.0 0.9.0 GHSA-fq3v-xjjx-95rc

References