CVE-2026-26192

HIGH

7.3

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.

CVE Details

CVSS v3.1 Score7.3

SeverityHIGH

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

Attack VectorNETWORK

ComplexityLOW

Privileges RequiredLOW

User InteractionREQUIRED

Published2/19/2026

Last Modified2/20/2026

Sourcenvd

Honeypot Sightings0

Affected Products

openwebui:open_webui

Weaknesses (CWE)

CWE-79

References

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

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

IOC Correlations

No correlations recorded

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