CVE-2026-87994
Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.9.5 until 0.11.1, the channel branch of chat_completion in backend/open_webui/main.py checked channel write access and channel membership for a supplied message_id but did not verify that the calling user authored the targeted message. A channel member could use the chat completions endpoint to replace another member's message while preserving the victim as the stored author, altering the conversation record without gaining access to other channels. This issue is fixed in version 0.11.1.
脆弱性の種類
Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.9.5 until 0.11.1, the channel branch of chat_completion in backend/open_webui/main.py checked channel write access and channel membership for a supplied message_id but did not verify that the calling user authored the targeted message. A channel member could use the chat completions endpoint to replace another member's message while preserving the victim as the stored author, altering the conversation record without gaining access to other channels. This issue is fixed in version 0.11.1.
影響を受ける製品
- openwebui open_webui
参考情報
- https://github.com/open-webui/open-webui/commit/7d392bedc9c1aaecc94509a58e59186b614433dc
- https://github.com/open-webui/open-webui/pull/28631
- https://github.com/open-webui/open-webui/releases/tag/v0.11.1
- https://github.com/open-webui/open-webui/security/advisories/GHSA-fmqh-xp37-5hr8
- https://github.com/open-webui/open-webui/security/advisories/GHSA-fmqh-xp37-5hr8