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.
Advisories
Source ID Title
Github GHSA Github GHSA GHSA-v56q-mh7h-f735 Immutable.js `List` 32-bit trie overflow → unrecoverable DoS
Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

Wed, 08 Jul 2026 20:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Wed, 08 Jul 2026 17:45:00 +0000

Type Values Removed Values Added
First Time appeared Immutable-js
Immutable-js immutable-js
Vendors & Products Immutable-js
Immutable-js immutable-js

Wed, 08 Jul 2026 16:30:00 +0000

Type Values Removed Values Added
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.
Title Immutable.js `List` 32-bit trie overflow → unrecoverable DoS
Weaknesses CWE-1284
CWE-190
CWE-400
CWE-835
References
Metrics cvssV4_0

{'score': 8.7, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-07-08T19:41:12.330Z

Reserved: 2026-07-07T16:40:07.982Z

Link: CVE-2026-59879

cve-icon Vulnrichment

Updated: 2026-07-08T17:51:30.655Z

cve-icon NVD

Status : Analyzed

Published: 2026-07-08T17:17:26.370

Modified: 2026-07-10T18:48:54.280

Link: CVE-2026-59879

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-08-01T16:00:05Z