CVE-2026-26192

HIGH

Open WebUI < 0.7.0 - Stored Cross-Site Scripting via Document Metadata HTML Property

Title source: llm

Description

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.

References (2)

Core 2

Core References

Vendor Advisory x_refsource_confirm

https://github.com/open-webui/open-webui/security/advisories/GHSA-xc8p-9rr6-97r2

Various Sources x_refsource_misc

https://github.com/open-webui/open-webui/blob/6f1486ffd0cb288d0e21f41845361924e0d742b3/src/lib/components/chat/Messages/Citations/CitationModal.svelte#L163-L170

View Writeup ZIP pw:eip

Scores

CVSS v3 7.3

EPSS 0.0004

EPSS Percentile 13.7%

Attack Vector NETWORK

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

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact total

Details

CWE

CWE-79

Status published

Products (1)

openwebui/open_webui < 0.7.0

Published Feb 19, 2026

Tracked Since Feb 19, 2026