CVE-2026-59879
Immutable.js `List` 32-bit trie overflow → unrecoverable DoS
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-190 CWE-400 CWE-835 CWE-1284 |
| Vendor | immutable-js |
| Product | immutable-js |
| Published | Jul 8, 2026 |
| Last Updated | Jul 8, 2026 |
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Affected Versions
immutable-js / immutable-js
>= 5.0.0-beta.1, < 5.1.8 < 4.3.9
References
github.com: https://github.com/immutable-js/immutable-js/security/advisories/GHSA-v56q-mh7h-f735 github.com: https://github.com/immutable-js/immutable-js/commit/a1a1ee412dcaa380ab325196283d06594ffe4b84 github.com: https://github.com/immutable-js/immutable-js/commit/f0bc997d8eb9886aff2236635aa210a95a04304a github.com: https://github.com/immutable-js/immutable-js/releases/tag/v4.3.9 github.com: https://github.com/immutable-js/immutable-js/releases/tag/v5.1.8