All vulnerabilities
CVE-2026-109288GHSA-wf9m-46cp-c6h6

open-webui: Open WebUI before 0.11.4 Stored XSS via javascript: URLs in Markdown Links

open-webui open-webui
Open in ThreatlineRecord JSON
CVSS
7.2High
ExploitationPublic exploit codeCISA's assessment says proof of concept code is public, assessed 13 Oct 2026. Not in the KEV catalogCISA via CVE List
Exploit odds (EPSS)0.23%Chance of exploitation activity in the next 30 days, higher than 13% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed in0.11.4Fixed versionCVE List
Published12 Oct 2026Updated 23 Oct 2026CVE List

What fixes it

A fixed version on one release line is not the upgrade target for every line. Check your exact version and any vendor backports.

Description

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.

Text from CVE List

Affected versions 2

  • open-webuiaffected: all versions before 0.11.4CVE List
  • open-webuiunaffected: 0.11.4CVE List

References 2