Vulnerability · Published Oct 12, 2026 · Assigned by VulnCheck

CVE-2026-109291Open WebUI 0.6.33 before 0.11.4 Stored XSS via Citation embed_url

High 7.3

In plain English

A high-severity cross-site scripting in open-webui from open-webui. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 20% of all known vulnerabilities).

Severity (CVSS 3.1)7.3High

Exploit odds (30 days)0.3%top 79.6% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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.

Affected products (as reported)

Vendor	Product	Versions
open-webui	open-webui	0.6.33 – before 0.11.4

Weakness: CWE-79 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N

References

GitHub Security Advisory (GHSA-qpqv-xwg8-cqpj) vendor-advisory
VulnCheck Advisory: Open WebUI 0.6.33 before 0.11.4 Stored XSS via Citation embed_url third-party-advisory