{"schemaVersion":3,"id":"CVE-2026-59714","aliases":["GHSA-x2ff-v5v8-m75m","PYSEC-2026-3605"],"status":"published","duplicateOf":null,"title":null,"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. 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