Sourced from immutable's releases.

v3.8.3

Fix Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution') in immutable

Sourced from immutable's changelog.

Changelog

All notable changes to this project will be documented in this file.

The format is based on Keep a Changelog, and this project adheres to Semantic Versioning. Dates are formatted as YYYY-MM-DD.

Unreleased

5.1.5

• Fix Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution') in immutable

5.1.4

• Migrate some files to TS by @​jdeniau in immutable-js/immutable-js#2125
  • Iterator.ts
  • PairSorting.ts
  • toJS.ts
  • Math.ts
  • Hash.ts
• Extract CollectionHelperMethods and convert to TS by @​jdeniau in immutable-js/immutable-js#2131
• Use npm trusted publishing only to avoid token stealing.

Documentation

• Fix/a11y issues by @​lyannel in immutable-js/immutable-js#2136
• Doc add Map.get signature update by @​borracciaBlu in immutable-js/immutable-js#2138
• fix(doc):minor-issues#2132 by @​JayMeDotDot in immutable-js/immutable-js#2133
• Fix algolia search by @​jdeniau in immutable-js/immutable-js#2135
• Typo in OrderedMap by @​jdeniau in immutable-js/immutable-js#2144

Internal

• chore: Sort all imports and activate eslint import rule by @​jdeniau in immutable-js/immutable-js#2119

5.1.3

TypeScript

• fix: allow readonly map entry constructor by @​septs in immutable-js/immutable-js#2123

Documentation

There has been a huge amount of changes in the documentation, mainly migrate from an autogenerated documentation from .d.ts file, to a proper documentation in markdown. The playground has been included on nearly all method examples. We added a page about browser extensions too: https://immutable-js.com/browser-extension/

Internal

... (truncated)

• c407425 bump v3.8.3
• c6ff68a release script on 3.x branch
• a675a66 Merge pull request #2179 from immutable-js/port-patch-for-cve-2026-29063
• 6e2cf1c Port patch for CVE 2026-29063 onto branch 3.x
• See full diff in compare view

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