Immutable-js vulnerabilities
We track 3 vulnerabilities in Immutable-js products across 2 products. 3 are rated high or critical, and none are known to be exploited. The most recent was published on July 8, 2026.
Latest Immutable-js vulnerabilities
- 7.5 High severity
immutable-js: Integer Overflow or Wraparound
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 setListBound
- 7.5 High severity
immutable-js: Inefficient Algorithmic Complexity
Immutable.js provides many Persistent Immutable data structures. Prior to 4.3.9 and 5.1.8, Immutable.Map and Immutable.Set keep keys that share the same 32-bit hash in a HashCollisionNode collision bucket that is scanned linearly, allowing an attacker who cont
- 9.8 Critical severity
immutable-js: Improperly Controlled Modification of Object Prototype Attributes
Immutable.js provides many Persistent Immutable data structures. Prior to versions 3.8.3, 4.3.7, and 5.1.5, Prototype Pollution is possible in immutable via the mergeDeep(), mergeDeepWith(), merge(), Map.toJS(), and Map.toObject() APIs. This issue has been pat