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    CVE-2026-45386

    Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.9.5, Pin/Unpin is a write operation (modifies the message's is_pinned , pinned_by, pinned_at fields), but in standard channels it only checks read permission, allowing users with read-only access to pin/unpin any message. This vulnerability is fixed in 0.9.5.

    Published:May 15, 2026
    Last Modified:May 19, 2026
    EPS:May 15, 2026
    EPSS Score:0.00032
    CVSS Score:4.3

    Affected Products

    Vendor
    Open-webui
    Product
    Open-webui
    Vendor
    Openwebui
    Product
    Open Webui

    Exploits

    https://github.com/open-webui/open-webui/security/advisories/GHSA-5gc6-xhv4-2wg6https://github.com/open-webui/open-webui/security/advisories/GHSA-5gc6-xhv4-2wg6

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

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    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