CVE-2026-26192CWE-79

Open WebUI vulnerable to Stored XSS via iFrame in citations model

High · published February 19, 2026

CVSS v3.1
7.3
EPSS
0%
Percentile
27.4
In the wild
Unconfirmed
What it is

Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to version 0.7.0, aanually modifying chat history allows setting the `html` property within document metadata. This causes the frontend to enter a code path that treats document contents as HTML, and render them in an iFrame when the citation is previewed. This allows stored XSS via a weaponized document payload in a chat. The payload also executes when the citation is viewed on a shared chat. Version 0.7.0 fixes the issue.

The record
Technical detail
CVSS v3.1
7.3 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N
CVSS v4.0
Not supplied
EPSS
0.00349 · 27.4th percentile
Weakness
CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Published
2026-02-19T19:10Z
EPSS history
Timeline
  • 19 FEB 19:10Z
    Open WebUI vulnerable to Stored XSS via iFrame in citations model
    cvelistv5