VULNERABILITY INTELLIGENCE
CVE-2026-59714
CVSS score7.1 HIGH
EPSS probability0.48%
CISA KEVNot currently listed
Published2026-08-13
Last modified2026-09-18
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L
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.
Weakness classification
- security-advisories@github.com: CWE-862