CVE-2026-109291

HIGHCVSS 7.3

Description

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.

Timeline

Published:October 12th, 2026 5:17 PM

Last modified:October 18th, 2026 12:17 PM

CVSS Scoring

CVSS v3: 7.3 (HIGH)

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N

Weaknesses (CWE)

CWE-79

References & Reports

Advisories, patches, and third-party reports

https://github.com/open-webui/open-webui/security/advisories/GHSA-qpqv-xwg8-cqpj
https://www.vulncheck.com/advisories/open-webui-0.6.33-before-0.11.4-stored-xss-via-citation-embed-url

Source: NIST NVD · Data may lag official sources by up to one minute