# CVE-2026-59879: Immutable.js `List` 32-bit trie overflow → unrecoverable DoS

> CVE-2026-59879: Immutable.js `List` 32-bit trie overflow → unrecoverable DoS. CVSS 7.5 (CVSS 3.1).

Canonical: https://rewindex.com/cve/CVE-2026-59879
Last updated: 2026-07-10T18:48:54Z

- Published: 2026-07-08 15:47 UTC · Updated: 2026-07-10 18:48 UTC · Assigner: GitHub\_M
- CVSS: 7.5 (CVSS 3.1) · Severity: High · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- EPSS: 0.58%, 47th percentile (scored 2026-10-25)
- CISA KEV: no
- CWE: CWE-1284, CWE-190, CWE-400, CWE-835

## Description

Immutable.js provides many Persistent Immutable data structures. Prior to 4.3.9 and 5.1.8, List\#set, List\#setSize, List\#setIn, List\#updateIn, and the functional set, setIn, and updateIn mishandle an index or size in the range 2 \*\* 30 to 2 \*\* 31 in setListBounds in src/List.js, causing an empty List to enter an uncatchable infinite loop, a populated List to allocate without bound until process abort, or setSize to silently wrap large values. This issue is fixed in versions 4.3.9 and 5.1.8.

## Affected vendors and products

- immutable-js: immutable-js

## Tracked companies

- [Confluence](https://rewindex.com/company/confluence.md)
- [Jira](https://rewindex.com/company/jira.md)

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2026-59879)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2026-59879)
- [https://github.com/immutable-js/immutable-js/commit/a1a1ee412dcaa380ab325196283d06594ffe4b84](https://github.com/immutable-js/immutable-js/commit/a1a1ee412dcaa380ab325196283d06594ffe4b84)
- [https://github.com/immutable-js/immutable-js/commit/f0bc997d8eb9886aff2236635aa210a95a04304a](https://github.com/immutable-js/immutable-js/commit/f0bc997d8eb9886aff2236635aa210a95a04304a)
- [https://github.com/immutable-js/immutable-js/releases/tag/v4.3.9](https://github.com/immutable-js/immutable-js/releases/tag/v4.3.9)
- [https://github.com/immutable-js/immutable-js/releases/tag/v5.1.8](https://github.com/immutable-js/immutable-js/releases/tag/v5.1.8)
- [https://github.com/immutable-js/immutable-js/security/advisories/GHSA-v56q-mh7h-f735](https://github.com/immutable-js/immutable-js/security/advisories/GHSA-v56q-mh7h-f735)

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_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


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Canonical: https://rewindex.com/cve/CVE-2026-59879 · Markdown: https://rewindex.com/cve/CVE-2026-59879.md · JSON: https://rewindex.com/api/v1/cves/CVE-2026-59879 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T02:14:26.212Z