Issues

• Security Advisory: Prototype Pollution via mergeObject() (CVE-2026-93753 / GHSA-gcqx-w48m-w2h4)

  TehShrike/deepmerge#285 · Filter by author paul1k opened on Oct 28, 2026

• Passing a frozen options object causes merge to throw

  TehShrike/deepmerge#279 · Filter by author sohail-fabtech opened on Oct 12, 2026

• Unnecessary files in the npm package

  TehShrike/deepmerge#272 · Filter by author belozer opened on Mar 25, 2026
  1

• [TypeScript Bug] Return type of deepmerge(target, source) incorrectly returned in some cases

  TehShrike/deepmerge#271 · Filter by author guisehn opened on Jan 13, 2026
  1

• Does not handle edge case like object key as Symbol

  TehShrike/deepmerge#267 · Filter by author Uanela opened on Apr 11, 2025

• is-mergeable-object is in devDependencies but used directly in index.js

  TehShrike/deepmerge#266 · Filter by author jorenbroekema opened on Feb 24, 2025

• Doesn't play nice with React 19 RC

  TehShrike/deepmerge#265 · Filter by author AnthonyPaulO opened on Jul 8, 2024
  1

• When merging arrays the target defaults to empty array

  TehShrike/deepmerge#264 · Filter by author nejcm opened on Jan 22, 2024

• [Feature request] Pass parent values to customMerge()

  TehShrike/deepmerge#263 · Filter by author broofa opened on Jan 10, 2024

• Feature Request: Passing a collision callback for colliding props

  TehShrike/deepmerge#262 · Filter by author jorenbroekema opened on Dec 19, 2023

• Add a way to merge into existing target object, just like Object.assign

  TehShrike/deepmerge#261 · Filter by author jihu opened on Nov 16, 2023

• It need filter on merge

  TehShrike/deepmerge#258 · Filter by author alexk400 opened on Mar 15, 2023

• A class instance in an array in an object get formed into an object.

  TehShrike/deepmerge#256 · Filter by author peterjarian opened on Feb 28, 2023

• deepmerge_1.default) is not a function (No Webpack)

  TehShrike/deepmerge#255 · Filter by author douglasg14b opened on Jan 10, 2023
  4

• add ESM, support for module and browser

  TehShrike/deepmerge#250 · Filter by author kopax-polyconseil opened on Aug 5, 2022
  5

• How to delete an element from an array with deepmerge.

  TehShrike/deepmerge#243 · Filter by author ghost opened on Jan 30, 2022
  1

• When a particular property of the source object is undefined while the target one has a value, the value will be override by undefined

  TehShrike/deepmerge#242 · Filter by author PhoenixMenia opened on Jan 19, 2022
  2

• Will we ever see the v5?

  TehShrike/deepmerge#241 · Filter by author KillyMXI opened on Dec 6, 2021
  4

• High CPU usage with large object merge

  TehShrike/deepmerge#237 · Filter by author samuraitruong opened on Aug 9, 2021
  1

• customMerge at lowest level of object

  TehShrike/deepmerge#216 · Filter by author dsl101 opened on Nov 13, 2020
  6

• New "clone" behavior

  TehShrike/deepmerge#212 · Filter by author RebeccaStevens opened on Nov 6, 2020
  5

• Throw error when target and source are different types

  TehShrike/deepmerge#210 · Filter by author fgarcia opened on Nov 2, 2020
  7

• Merging objects discards target class information

  TehShrike/deepmerge#208 · Filter by author creativeux opened on Oct 25, 2020
  6

• Handling circular references

  TehShrike/deepmerge#207 · Filter by author nonara opened on Oct 17, 2020
  16

• Map and Set merging support

  TehShrike/deepmerge#204 · Filter by author RebeccaStevens opened on Sep 17, 2020
  1