GHSA-fmqh-xp37-5hr8: Open WebUI: Channel members can overwrite another member's message via the chat completions endpoint

Summary

GHSA-fmqh-xp37-5hr8 affects Open WebUI. The channel branch of the chat completions endpoint checked channel write access and message channel membership but did not verify that the caller authored the targeted message, so any channel member who can post could replace another member's message text while the original author stayed attached. The dedicated channel message edit route already performed the authorship check.

Mitigation

Fixed in 0.11.1 by commit `7d392bedc` (#28631). Upgrading to 0.11.1 fully resolves this, and no configuration change is required.

Affected packages in the Exposure Registry

Matched by package name and ecosystem. Each entry shows whether the package delegates to a language model and how many tracked packages depend on it.

• open-webuiPyPILLM dependency since 2024-05-20

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