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    CVE-2026-85661

    excel-mcp-server 0.1.8 fails to enforce path confinement in stdio mode when EXCEL_FILES_PATH is unset, allowing attackers to read and write arbitrary files. Attackers can supply unchecked file paths to read and write tools to access any file accessible to the process.

    Published:Sep 4, 2026
    Last Modified:Sep 4, 2026
    EPS:Sep 4, 2026
    EPSS Score:
    CVSS Score:9.8

    Affected Products

    Vendor
    Haris-musa
    Product
    Excel-mcp-server

    Exploits

    No exploit reference

    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