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    CVE-2026-18640

    The NewNotebook API does not sufficiently sanitize its parameters allowing an authenticated user with NOTEBOOK_EDIT permission to write the notebook record outside the org's data store directory. The file written must have an extension of ".json.db" but can otherwise overwrite other metadata files (such as ACL records, hunts etc). This can corrupt these files and cause data corruption.

    Published:Aug 11, 2026
    Last Modified:Aug 11, 2026
    EPS:Aug 11, 2026
    EPSS Score:
    CVSS Score:7.1

    Affected Products

    Vendor
    Rapid7
    Product
    Velociraptor

    Exploits

    No exploit reference

    Related CVEs

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    CVE-2026-64951 (CVSS 3.5) — A rogue Velociraptor client can upload a malformed sparse file such that if the GUI attempts to expand the fil…
    CVE-2026-64952 (CVSS 6.5) — The hunt_delete() VQL function allows deleting hunts.  Velociraptor misapplied the permission check requiring…
    CVE-2026-64955 (CVSS 6.1) — When Microsoft Excel imports a CSV file, it executes cells beginning with certain characters as formulas, givi…
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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