CVE-2026-26193

HIGH

7.3

Description

Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to version 0.6.44, aanually modifying chat history allows setting the `embeds` property on a response message, the content of which is loaded into an iFrame with a sandbox that has `allow-scripts` and `allow-same-origin` set, ignoring the "iframe Sandbox Allow Same Origin" configuration. This enables stored XSS on the affected chat. This also triggers when the chat is in the shared format. The result is a shareable link containing the payload that can be distributed to any other users on the instance. Version 0.6.44 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/ResponseMessage.svelte#L689-L703(security-advisories@github.com)

https://github.com/open-webui/open-webui/security/advisories/GHSA-vjm7-m4xh-7wrc(security-advisories@github.com)

IOC Correlations

No correlations recorded

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