CVE-2026-109290
HIGH
NVD
CVSS Score
7.3
Severity
HIGH
Published
Oct 12, 2026
Vendor
unknown
Description
Open WebUI from 0.11.1 before 0.11.4 contains a stored cross-site scripting vulnerability in DocxPreview.svelte that allows authenticated users to execute script by uploading crafted DOCX attachments. Attackers can embed an OOXML altChunk HTML part or script-scheme hyperlink to steal a previewing administrator's session token from local storage and take over the instance.