github.com
https://github.com/open-webui/open-webui CVE-2026-59714
HIGH
Open WebUI: Cross-channel message overwrite via chat completion API (single-model and multimodel message_ids)
Record summary
CVE-2026-59714 has a selected CVSS score of 7.1 (high).
Description
Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.9.5 before 0.10.0, any authenticated user can overwrite the content of a message in a channel they do not belong to (including private and DM channels) by sending a chat completion request with a channel:-prefixed chat_id and a target message_id. The channel: path routes pipeline output through _make_channel_emitter, which writes to the Messages table using the caller-supplied message_id without binding it to the channel. This issue is fixed in version 0.10.0.
Description source: CVE List
Affected products and versions
2| Product | Source | Version range | Status |
|---|---|---|---|
open-webuiBrowse open-webui / open-webui | CVE List | >= 0.9.5, < 0.10.0 | affected |
open-webuiBrowse PyPI / open-webui | GitHub Advisory | 0.9.5 to < 0.10.0 · Fixed in 0.10.0 | affected |
References
6github.com
https://github.com/open-webui/open-webui/commit/33e4e0dcc43afcca80f9c635d762cdc76c768ba9 github.com
https://github.com/open-webui/open-webui/commit/ac3449cac91e62b08a7c28e54fcd044d14dea791 github.com
https://github.com/open-webui/open-webui/pull/26385 github.com
https://github.com/open-webui/open-webui/releases/tag/v0.10.0 github.comConfirmation
https://github.com/open-webui/open-webui/security/advisories/GHSA-x2ff-v5v8-m75m