{"id":"CVE-2026-109290","published":"2026-10-12T17:17:22.210","lastModified":"2026-10-15T15:55:45.630","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.","cvssScore":7.3,"cvssSeverity":"HIGH","cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N","cwes":["CWE-79"],"vendors":[],"products":[],"references":[{"url":"https://github.com/open-webui/open-webui/security/advisories/GHSA-f9xp-mfmq-x6cg","tags":[]},{"url":"https://www.vulncheck.com/advisories/open-webui-0.11.1-before-0.11.4-stored-xss-via-docx-preview","tags":[]},{"url":"https://github.com/open-webui/open-webui/security/advisories/GHSA-f9xp-mfmq-x6cg","tags":[]}],"exploitRefs":[{"url":"https://github.com/open-webui/open-webui/security/advisories/GHSA-f9xp-mfmq-x6cg","tags":[]},{"url":"https://github.com/open-webui/open-webui/security/advisories/GHSA-f9xp-mfmq-x6cg","tags":[]}],"hasPoc":true,"ai":null}