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    CVE-2026-2299

    The Mattermost Google Drive plugin before version 1.1.0 fails to validate channel membership in the file creation endpoint, allowing authenticated users with a connected Google account to share Google Drive files to unauthorized private channels and disclose private channel membership.

    Published:Jun 25, 2026
    Last Modified:Aug 11, 2026
    EPS:Jun 25, 2026
    EPSS Score:0.00119
    CVSS Score:4.2

    Affected Products

    Vendor
    Mattermost
    Product
    Google Drive
    Vendor
    Mattermost
    Product
    Mattermost Google Drive Plugin

    Exploits

    No exploit reference

    Common Weakness Enumeration

    CWE-862 Missing Authorization

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-665 Exploitation of Thunderbolt Protection Flaws

    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