node-immutable: Immutable.js provides many Persistent Immutable data structures
CVE-2026-59879 is fixed in node-immutable on 1 platform by DEBIAN-CVE-2026-59879 (version 4.3.9-1), released July 8, 2026. It is not reported as exploited. Patch Radar priority: High.
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.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| node-immutable · Debian 14 | 4.3.9-1 | DEBIAN-CVE-2026-59879 | Jul 8, 2026 |
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