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CVE-2026-88000

CVE-2026-88000 · Open WebUI: Any authenticated user can hang the server via message deletion in a cyclic chat tree

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 0.10.0 until 0.11.1, DELETE /api/v1/chats/{id}/messages/{message_id} used the chat-history deletion helper in backend/open_webui/models/chats.py to follow childrenIds without recording visited message identifiers. An authenticated user could store a cyclic chat tree and delete a message, causing a synchronous infinite loop on the server request loop that blocked every user's requests until the process was killed. This issue is fixed in version 0.11.1.

CVSS 6.5 · Medium · EPSS 0.6% · Fix available

Published
Updated

Stack: python

Affected products and versions

  • open-webui

    Versions
    • >= 0.10.0, < 0.11.1: Affected

    No fix published

  • open-webui PyPI

    Versions
    • 0.10.0
    • 0.10.1
    • 0.10.2
    • 0.11.0
    Affected ranges
    • ECOSYSTEM: ≥ 0.10.0, < 0.11.1

    Update to 0.11.1

Original sources

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