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OpenAdvisories
High · 7.3 CVE-2026-26192 EUVD-2026-7982GHSA-xc8p-9rr6-97r2PYSEC-2026-2769

Open WebUI vulnerable to Stored XSS via iFrame in citations model

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 0.7.0, 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.

Affected products

VendorProductAffectedFixed
open-webui open-webui < 0.7.0 —

Affected packages

EcosystemPackageAffectedFixedRecord
PyPI open-webui < 0.7.0 0.7.0 GHSA-xc8p-9rr6-97r2

References