CVE-2026-87997

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    CVE-2026-87997

    Published: 9 Sept 2026Last Modified: 12 Sept 2026

    Summary: Open WebUI: Any authenticated user can inject chats into another user's folder via chat completions

    Details: Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.10.0 until 0.11.1, POST /api/chat/completions and POST /api/v1/chat/completions in backend/open_webui/main.py copied a client-supplied folder_id into a new chat without applying the folder write-access check used by the dedicated chat routes. An authenticated user who knew a shared folder identifier could inject an attacker-controlled chat into a folder where the user had read-only or no write access, causing the entry to appear to authorized folder readers. This issue is fixed in version 0.11.1.

    References: https://github.com/open-webui/open-webui/releases/tag/v0.11.1, https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/87xxx/CVE-2026-87997.json, https://github.com/open-webui/open-webui/security/advisories/GHSA-3pf7-q2g3-wj28, https://nvd.nist.gov/vuln/detail/CVE-2026-87997, https://github.com/open-webui/open-webui/commit/d9e23b90c100d19b00270aea3cde0501d2354a6c, https://github.com/open-webui/open-webui/pull/28366

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 4d2e13cf2bcc451b33bb6374bea4d2163e6cc94c
    Fixed -d9e23b90c100d19b00270aea3cde0501d2354a6c

    Affected versions

    v0.11.0

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High
    CVE-2026-87997 | CVE-DB