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.
Advisories
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Fixes
Solution
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Workaround
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References
History
Wed, 08 Jul 2026 17:30:00 +0000
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ssvc
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Wed, 08 Jul 2026 17:00:00 +0000
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Immutable-js
Immutable-js immutable-js |
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Immutable-js
Immutable-js immutable-js |
Wed, 08 Jul 2026 15:45:00 +0000
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| 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. | |
| Title | Immutable.js: Hash-collision algorithmic complexity denial of service in Immutable.Map/Set | |
| Weaknesses | CWE-407 | |
| References |
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| Metrics |
cvssV4_0
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Projects
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Status: PUBLISHED
Assigner: GitHub_M
Published:
Updated: 2026-07-08T16:13:46.106Z
Reserved: 2026-07-07T16:40:07.982Z
Link: CVE-2026-59880
Updated: 2026-07-08T16:13:42.683Z
No data.
No data.
OpenCVE Enrichment
Updated: 2026-07-08T16:45:03Z
Weaknesses