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    CVE-2026-42796

    Arelle before 2.39.10 contains an unauthenticated remote code execution vulnerability in the /rest/configure REST endpoint that accepts a plugins query parameter and forwards it to the plugin manager without authentication or authorization. Attackers can supply a URL to a malicious Python file through the plugins parameter, causing the Arelle webserver to download and execute the attacker-controlled code within the Arelle process with its privileges.

    Published:May 4, 2026
    Last Modified:May 27, 2026
    EPS:May 4, 2026
    EPSS Score:0.00331
    CVSS Score:9.8

    Affected Products

    Vendor
    Arelle
    Product
    Arelle
    Vendor
    Workiva
    Product
    Arelle

    Exploits

    https://github.com/ameerhamza-malik/CVE-2026-42796

    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