---
id: CVE-2026-109288
title: >-
  Open WebUI before 0.11.4 contains a stored cross-site scripting vulnerability
  in MarkdownInlineTokens.svelte, which renders markdown link URLs into anchor
  hrefs without validating their scheme
summary: >-
  Open WebUI before 0.11.4 contains a stored cross-site scripting vulnerability
  in MarkdownInlineTokens.svelte, which renders markdown link URLs into anchor
  hrefs without validating their scheme. Authenticated users can embed
  javascript: l…
severity: medium
cvss: 6.4
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:N'
cwe:
  - CWE-79
published: '2026-10-12'
updated: '2026-10-12'
sourceUpdated: '2026-10-12T17:17:21.913'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-109288'
references:
  - url: >-
      https://github.com/open-webui/open-webui/security/advisories/GHSA-wf9m-46cp-c6h6
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/open-webui-before-0.11.4-stored-xss-via-javascript-urls-in-markdown-links
    label: disclosure@vulncheck.com
tags:
  - nvd
ingestedAt: '2026-10-12T18:00:08.189Z'
---

## Overview

Open WebUI before 0.11.4 contains a stored cross-site scripting vulnerability in MarkdownInlineTokens.svelte, which renders markdown link URLs into anchor hrefs without validating their scheme. Authenticated users can embed javascript: links in shared chats that, when clicked by a victim, steal the victim's JWT from local storage, including admins' tokens.

## Remediation

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