HIGH 8.4 NVD
CVE-2026-109290
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 scrip
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.
References
- https://github.com/open-webui/open-webui/security/advisories/GHSA-f9xp-mfmq-x6cg
- https://www.vulncheck.com/advisories/open-webui-0.11.1-before-0.11.4-stored-xss-via-docx-p
This high severity vulnerability with a CVSS score of 8.4 was published on 2026-10-12 via NVD.
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