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OpenAdvisories
High · 7.3 CVE-2026-26193 EUVD-2026-7981GHSA-vjm7-m4xh-7wrcPYSEC-2026-2760

Open WebUI vulnerable to Stored XSS via iFrame embeds in response messages

Published Feb 19, 2026 · Updated Feb 19, 2026 · Assigned by GitHub_M

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.

Affected products

VendorProductAffectedFixed
open-webui open-webui < 0.6.44 —

Affected packages

EcosystemPackageAffectedFixedRecord
PyPI open-webui < 0.6.44 0.6.44 GHSA-vjm7-m4xh-7wrc

References