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Details of issue NIXPKGS-2026-0294

NIXPKGS-2026-0294
published on
Permalink CVE-2026-26193
7.3 HIGH
  • CVSS version: 3.1
  • Attack vector (AV): NETWORK
  • Attack complexity (AC): LOW
  • Privileges required (PR): LOW
  • User interaction (UI): REQUIRED
  • Scope (S): UNCHANGED
  • Confidentiality impact (C): HIGH
  • Integrity impact (I): HIGH
  • Availability impact (A): NONE
updated 1 month, 2 weeks ago by @LeSuisse Activity log
  • Created automatic suggestion 1 month, 2 weeks ago
  • @LeSuisse accepted 1 month, 2 weeks ago
  • @LeSuisse published on GitHub 1 month, 2 weeks ago
Open WebUI vulnerable to Stored XSS via iFrame embeds in response messages

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

open-webui
  • ==< 0.6.44

Matching in nixpkgs

pkgs.open-webui

Comprehensive suite for LLMs with a user-friendly WebUI

Package maintainers

Upstream advisory: https://github.com/open-webui/open-webui/security/advisories/GHSA-vjm7-m4xh-7wrc
Upstream patch: https://github.com/open-webui/open-webui/blob/6f1486ffd0cb288d0e21f41845361924e0d742b3/src/lib/components/chat/Messages/ResponseMessage.svelte#L689-L703