npm / PACKAGE INTELLIGENCE

deepmerge

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Behind the package

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A library for deep (recursive) merging of Javascript objects

Latest release4.3.1

Declared licenseMIT

Listed maintainerstehshrike

Runtime dependencies0

Install-time scriptsNone declared

Integrity metadataRecorded by registry

Attestation metadataNot recorded

Registry deprecationNot marked deprecated

Fetched 28/10/2026, 10:55:43 UTC · Original registry metadata

Release history

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Advisories & recorded fixes

medium5.3

GHSA-gcqx-w48m-w2h4

deepmerge mergeObject() allows prototype poisoning of returned objects

npm / deepmerge

18 Sept 2026

deepmerge npm

Affected range	Recorded fix
From 4.2.0 through 4.3.1 (inclusive)Semantic versions	Not recorded

Version evidence: OSV · GHSA-gcqx-w48m-w2h4

View original version evidence

{
  "ranges": [
    {
      "events": [
        {
          "introduced": "4.2.0"
        },
        {
          "last_affected": "4.3.1"
        }
      ],
      "type": "SEMVER"
    }
  ],
  "versions": []
}