npm package report

Is source-map-js safe?

1 known vulnerability, worst severity HIGH.

// reach

0 direct dependencies

none carry a known advisory

    28 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
    0.0
    high

    severity out of 10

    epss
    0.00%
    medium

    chance of exploitation in 30 days, 48th percentile of all CVEs

    xyz score
    not scored

    CyberXYZ composite out of 10

    fig. 01 — GHSA-68fv-2mgg-jv7q, the advisory selected below

    // 1 advisories

    GHSA-68fv-2mgg-jv7q

    HIGHCVE-2026-93749

    source-map-js through 1.2.1 fails to validate the per-section offset line value in indexed source maps, allowing attackers to specify arbitrary numeric values. Attackers can supply extremely large offset line values that cause synchronous event loop blocking for extended periods, preventing the service from handling other requests.

    // cvss v4.0 vector

    CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

    Attack vector
    Network
    Attack complexity
    Low
    Attack requirements
    None
    Privileges required
    None
    User interaction
    None
    Confidentiality (vulnerable system)
    None
    Integrity (vulnerable system)
    None
    Availability (vulnerable system)
    High
    Confidentiality (subsequent systems)
    None
    Integrity (subsequent systems)
    None
    Availability (subsequent systems)
    None

    Checked 2026-10-06 at 02:00 UTC. The most recent advisory here was published 2026-09-18. Updated continuously from NVD, GHSA, OSV and CNA feeds.

    Think a verdict here is wrong? Tell us — we respond within 2 business days.