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CVE-2026-26021

CVE-2026-26021 · Prototype pollution in set-in

This page contains facts from public vulnerability sources. Check the original advisory before updating.

set-in provides the set value of nested associative structure given array of keys. A prototype pollution vulnerability exists in the the npm package set-in (>=2.0.1, < 2.0.5). Despite a previous fix that attempted to mitigate prototype pollution by checking whether user input contained a forbidden key, it is still possible to pollute Object.prototype via a crafted input using Array.prototype. This has been fixed in version 2.0.5.

CVSS 9.4 · Critical · EPSS 0.6% · Fix available

Published
Updated

Stack: node

Affected products and versions

  • set-in

    Versions
    • >= 2.0.1, < 2.0.5: Affected

    No fix published

  • set-in npm

    Affected ranges
    • SEMVER: ≥ 2.0.1, < 2.0.5

    Update to 2.0.5

Original sources

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