CVSS 4.0
8.7 highCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:NCVE-2026-59879
High (8.7) in immutable-js immutable. EPSS 0.6% chance of exploitation in the next 30 days. Fixed in immutable 3.8.4, 4.3.9, 5.1.8.
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.
Severity
CVSS 3.1
7.5 highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H- EPSS
- 0.6% chance of exploitation in the next 30 days; higher than 47% of CVEs (scores of 2026-10-31)
- CWEs
- CWE-190, CWE-400, CWE-835, CWE-1284
- Published
- Modified
- Record from
- the NVD, synced
Affected
- immutable-js:immutable
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-v56q-mh7h-f735 | npm | immutable | >=4.0.0-rc.1 <4.3.9 | 4.3.9 |
| GHSA-v56q-mh7h-f735 | npm | immutable | >=5.0.0-beta.1 <5.1.8 | 5.1.8 |
| GHSA-v56q-mh7h-f735 | npm | immutable | <3.8.4 | 3.8.4 |
References
- 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/releases/tag/v4.3.9
- 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