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CVE-2026-59880 Immutable.js provides many Persistent Immutable data structures
Description
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 controls keys inserted into a Map, such as through Immutable.Map(obj), Immutable.fromJS(obj), state.merge(userObject), or mergeDeep, to craft many colliding keys and degrade insertion and lookup to consume disproportionate CPU. This issue is fixed in versions 4.3.9 and 5.1.8.
Produits et versions touchés
| Produit | Versions touchées | Corrigé en |
|---|---|---|
| immutable-js 5.0 | 5.0.0-beta.1 → < 5.1.8 | 5.1.8 |
| immutable-js 4.3 | premières → < 4.3.9 | 4.3.9 |