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VULNERABILITIES

CVE-2026-109290 Details

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.

Metrics

CVSS 3.x Severity and Vector Strings:

CNA: [email protected]CVSS-B:8.7 HIGHVector:CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N

References to Advisories, Solutions, and Tools

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URLSource(s)Tag(s)
https://github.com/open-webui/open-webui/security/advisories/GHSA-f9xp-mfmq-x6cg CISA-ADP
https://github.com/open-webui/open-webui/security/advisories/GHSA-f9xp-mfmq-x6cg [email protected]
https://www.vulncheck.com/advisories/open-webui-0.11.1-before-0.11.4-stored-xss-via-docx-preview [email protected]

Weakness Enumeration

CWE-IDCWE NameSource
CWE-1021Improper Restriction of Rendered UI Layers or Frames[email protected]
CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')[email protected]

Affected Products

No affected product data is available for this CVE.

Change History

3 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2026-109290
NVD Published Date:
Oct 12, 2026
NVD Last Modified:
Oct 23, 2026
Source:
[email protected]
CVE-2026-109290 Details - Not Deferred