CVE-2026-59714
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.
How to fix
- open-webui0.10.0 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| open-webuiPyPI | 0.9.5 ≤ v < 0.10.0 | 0.10.0 |
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Attack Surface Management
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