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CVE PROGRAM SOURCE RECORD8.7 High

CVE-2026-59879

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

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.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

immutable-js immutable-js

  • >= 5.0.0-beta.1, < 5.1.8affected
  • < 4.3.9affected

References