CVE-2026-59880 (GCVE-0-2026-59880)
Vulnerability from cvelistv5
Published
2026-07-08 15:44
Modified
2026-07-08 16:13
Severity ?
8.7 (High) - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
CWE
  • CWE-407 - Inefficient Algorithmic Complexity
Summary
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.
References
Impacted products
Vendor Product Version
immutable-js immutable-js Version: < 4.3.9
Version: >= 5.0.0-beta.1, < 5.1.8
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