CVE-2026-59714
Open WebUI: Cross-channel message overwrite via chat completion API (single-model and multimodel message_ids)
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.
INFO
Published Date :
Aug. 13, 2026, 7:10 p.m.
Last Modified :
Aug. 13, 2026, 7:10 p.m.
Remotely Exploit :
No
Source :
GitHub_M
Affected Products
The following products are affected by CVE-2026-59714
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
No affected product recoded yet
Solution
- Upgrade Open WebUI to version 0.10.0 or later.
- Apply security patches for Open WebUI.
- Review access controls for message channels.
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