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npm package

source-map-js

Open actionable advisories and recorded vendor fixes. This public package view has no inventory attached and cannot establish whether your deployment is affected. A vendor fix never resolves your finding; verify your installed version and the source guidance.

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1 actionable advisory, newest first. Withdrawn advisories and news are excluded. Coverage is partial.

  1. High, CVSS 8.7npmAmendedPublished

    source-map-js allows event-loop denial of service through indexed source-map section offsets

    CVE-2026-93749 · GHSA-68fv-2mgg-jv7q

    Affected
    • npm source-map-js >= 1.0.0, < 1.2.2
    Fixed in
    1.2.2· Vendor fix available
    Issue
    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.

    Recommended action: Upgrade to 1.2.2 or later, then redeploy and verify.A vendor fix does not resolve your finding until you verify it in your own systems.

    Sources:github.com (1)osv.dev (2)Source checked Evidence →