---
id: CVE-2026-109291
title: >-
  Open WebUI from 0.6.33 before 0.11.4 contains a cross-site scripting
  vulnerability that allows authenticated users to execute script in victims'
  sessions by storing javascript: URLs in citation embed_url fields
summary: >-
  Open WebUI from 0.6.33 before 0.11.4 contains a cross-site scripting
  vulnerability that allows authenticated users to execute script in victims'
  sessions by storing javascript: URLs in citation embed_url fields. Attackers
  can share a cra…
severity: high
cvss: 7.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N'
cwe:
  - CWE-79
published: '2026-10-12'
updated: '2026-10-12'
sourceUpdated: '2026-10-12T17:17:22.353'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-109291'
references:
  - url: >-
      https://github.com/open-webui/open-webui/security/advisories/GHSA-qpqv-xwg8-cqpj
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/open-webui-0.6.33-before-0.11.4-stored-xss-via-citation-embed-url
    label: disclosure@vulncheck.com
tags:
  - nvd
ingestedAt: '2026-10-12T18:00:08.190Z'
---

## Overview

Open WebUI from 0.6.33 before 0.11.4 contains a cross-site scripting vulnerability that allows authenticated users to execute script in victims' sessions by storing javascript: URLs in citation embed_url fields. Attackers can share a crafted chat whose citation, when clicked, is passed to window.open, letting them steal localStorage.token and act as the victim.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.