npm package report

Is flat safe?

1 known vulnerability, worst severity CRITICAL.

// reach

1 direct dependencies

none carry a known advisory

    80 packages depend on it

    an advisory here reaches each of them

    Create a free accountfor every dependency path, dependent and what to upgrade
    // ai model usage

    Tracked for PyPI packages. HuggingFace models declare Python dependencies, so npm packages are not covered.

    cvss
    9.8
    critical

    CVSS v3.1 base score out of 10

    epss
    1.2%
    medium

    chance of exploitation in 30 days, 68th percentile of all CVEs

    xyz score
    5.3
    medium

    CyberXYZ composite out of 10

    fig. 01 — GHSA-2j2x-2gpw-g8fm, the advisory selected below

    // 1 advisories

    GHSA-2j2x-2gpw-g8fm

    CRITICALGitHub ratingCVE-2020-36632

    flat helps flatten/unflatten nested Javascript objects. A vulnerability, which was classified as critical, was found in hughsk flat up to 5.0.0. This affects the function unflatten of the file index.js. The manipulation leads to improperly controlled modification of object prototype attributes ('prototype pollution'). It is possible to initiate the attack remotely. Upgrading to version 5.0.1 can address this issue. The name of the patch is 20ef0ef55dfa. It is recommended to upgrade the affected component. The identifier VDB-216777 was assigned to this vulnerability.

    // cvss v3.1 vector

    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

    Attack vector
    Network
    Attack complexity
    Low
    Privileges required
    None
    User interaction
    None
    Scope
    Unchanged
    Confidentiality
    High
    Integrity
    High
    Availability
    High

    Checked 2026-11-06 at 23:52 UTC. The most recent advisory here was published 2022-12-25. Updated continuously from NVD, GHSA, OSV and CNA feeds.

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