high7.1
CVE-2026-59714
Open WebUI: Cross-channel message overwrite via chat completion API (single-model and multimodel message_ids)
Impact
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.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| pip | open-webui | >= 0.9.5, < 0.10.0 | 0.10.0 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/advisories/GHSA-x2ff-v5v8-m75m
- https://github.com/open-webui/open-webui/security/advisories/GHSA-x2ff-v5v8-m75m
- https://github.com/open-webui/open-webui/commit/33e4e0dcc43afcca80f9c635d762cdc76c768ba9
- https://github.com/open-webui/open-webui/commit/ac3449cac91e62b08a7c28e54fcd044d14dea791
- https://github.com/open-webui/open-webui/releases/tag/v0.10.0
- https://github.com/open-webui/open-webui/pull/26385