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    CVE-2026-21851

    MONAI (Medical Open Network for AI) is an AI toolkit for health care imaging. In versions up to and including 1.5.1, a Path Traversal (Zip Slip) vulnerability exists in MONAI's `_download_from_ngc_private()` function. The function uses `zipfile.ZipFile.extractall()` without path validation, while other similar download functions in the same codebase properly use the existing `safe_extract_member()` function. Commit 4014c8475626f20f158921ae0cf98ed259ae4d59 fixes this issue.

    Published:Jan 7, 2026
    Last Modified:Apr 18, 2026
    EPS:Jan 7, 2026
    EPSS Score:0.00018
    CVSS Score:5.3

    Affected Products

    Vendor
    Monai
    Product
    Monai
    Vendor
    Project-monai
    Product
    Monai

    Exploits

    https://github.com/Project-MONAI/MONAI/security/advisories/GHSA-9rg3-9pvr-6p27https://github.com/Project-MONAI/MONAI/security/advisories/GHSA-9rg3-9pvr-6p27

    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