immutable-js
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@@ -11,6 +11,21 @@ Dates are formatted as YYYY-MM-DD.
 - fix(IndexedCollection): `has(index)` on a lazy `Seq` of unknown size now checks index existence instead of searching for a value equal to the index
 - [TypeScript]: `reduce`/`reduceRight` without an initial value now infer the result type from the collection's values when the reducer returns a value (e.g. `list.reduce((a, b) => a + b)` infers `number`), matching `Array#reduce`. Previously an explicit type argument was required.
 
+## 5.1.8
+
+- fix(List): guard oversized bounds in setListBounds. Fixes CVE https://github.com/immutable-js/immutable-js/security/advisories/GHSA-v56q-mh7h-f735
+- perf(Map): index large hash-collision buckets for faster lookups. Fixes CVE https://github.com/immutable-js/immutable-js/security/advisories/GHSA-xvcm-6775-5m9r
+
+## 4.3.9
+
+- fix(List): guard oversized bounds in setListBounds. Fixes CVE https://github.com/immutable-js/immutable-js/security/advisories/GHSA-v56q-mh7h-f735
+- perf(Map): index large hash-collision buckets for faster lookups. Fixes CVE https://github.com/immutable-js/immutable-js/security/advisories/GHSA-xvcm-6775-5m9r
+
+
+## 5.1.7
+
+- fix(Repeat): lastIndexOf returned size instead of size - 1 by @chatman-media in https://github.com/immutable-js/immutable-js/pull/2227. Fixes CVE [CVE-2026-29063 ](https://github.com/immutable-js/immutable-js/security/advisories/GHSA-wf6x-7x77-mvgw)
+
 ## 5.1.6
 
 - fix(reverseFactory): read `reversedSequence.size` in `__iterator` instead of this [#2196](https://github.com/immutable-js/immutable-js/pull/2196)