CVE-2026-59879

HIGH

Immutable.js `List` 32-bit trie overflow → unrecoverable DoS

Title source: cna
STIX 2.1

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.

References (5)

Core 5

Scores

CVSS v3 7.5
EPSS 0.0044
EPSS Percentile 36.0%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CISA SSVC

Vulnrichment
Exploitation poc
Automatable yes
Technical Impact partial

Details

CWE
CWE-1284 CWE-190 CWE-400 CWE-835
Status published
Products (5)
immutable-js/immutable < 4.3.9
immutable-js/immutable-js < 4.3.9
immutable-js/immutable-js >= 5.0.0-beta.1, < 5.1.8
npm/immutable 0 - 4.3.9npm
npm/immutable 5.0.0-beta.1 - 5.1.8npm
Published Jul 08, 2026
Tracked Since Jul 08, 2026