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CVE-2026-59714

CVE-2026-59714 · Open WebUI: Cross-channel message overwrite via chat completion API (single-model and multimodel message_ids)

This page contains facts from public vulnerability sources. Check the original advisory before updating.

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.

CVSS 7.1 · High · EPSS 0.5% · Fix available

Published
Updated

Stack: python

Affected products and versions

  • open-webui

    Versions
    • >= 0.9.5, < 0.10.0: Affected

    No fix published

  • open-webui PyPI

    Versions
    • 0.9.5
    • 0.9.6
    Affected ranges
    • ECOSYSTEM: ≥ 0.9.5, < 0.10.0

    Update to 0.10.0

Original sources

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