High
node-immutable — security advisory
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.
- Products
- node-immutable
- Affected versions
- 3.8.2+dfsg-3, 4.0.0-1, 4.0.0-2, 4.1.0-3, 4.3.4-1, 4.3.8-2, 4.3.9-1
- Fixed versions
- Not specified
- CVEs
- CVE-2026-59880
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 02:49 UTC · Revision 1
Source evidence
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.
osv:UBUNTU-CVE-2026-59880
node-immutable
Fixed versions: Not specified
node-immutable
Fixed versions: Not specified
node-immutable
Fixed versions: Not specified
node-immutable
Fixed versions: Not specified
node-immutable
Fixed versions: Not specified
node-immutable
Fixed versions: Not specified
Complete source record
{
"id": "7b19f5c9c05d369c6b04ca21f67db42fcc33a45125db4ea3c095182c9313b289",
"url": "https://osv.dev/vulnerability/UBUNTU-CVE-2026-59880",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "UBUNTU-CVE-2026-59880",
"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.",
"evidence": "osv:UBUNTU-CVE-2026-59880",
"products": [
{
"name": {
"value": "node-immutable",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "3.8.2+dfsg-3",
"evidence": "/affected/0/versions"
}
]
},
{
"name": {
"value": "node-immutable",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "3.8.2+dfsg-3",
"evidence": "/affected/1/versions"
},
{
"value": "4.0.0-1",
"evidence": "/affected/1/versions"
},
{
"value": "4.0.0-2",
"evidence": "/affected/1/versions"
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{
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"affected_versions": [
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"value": "4.1.0-3",
"evidence": "/affected/2/versions"
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{
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"evidence": "/affected/2/versions"
}
]
},
{
"name": {
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"evidence": "/affected/3/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "4.3.4-1",
"evidence": "/affected/3/versions"
}
]
},
{
"name": {
"value": "node-immutable",
"evidence": "/affected/4/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "4.3.8-2",
"evidence": "/affected/4/versions"
},
{
"value": "4.3.9-1",
"evidence": "/affected/4/versions"
}
]
},
{
"name": {
"value": "node-immutable",
"evidence": "/affected/5/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "4.3.4-1",
"evidence": "/affected/5/versions"
},
{
"value": "4.3.8-2",
"evidence": "/affected/5/versions"
}
]
}
],
"severity": "high",
"structured": {
"id": "UBUNTU-CVE-2026-59880",
"aliases": [
"UBUNTU-CVE-2026-59880"
],
"metrics": [
{
"type": "CVSS_V4",
"score": "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"
},
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
},
{
"type": "Ubuntu",
"score": "medium"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "node-immutable",
"purl": "pkg:deb/ubuntu/node-immutable?arch=source&distro=focal",
"ecosystem": "Ubuntu:20.04:LTS"
},
"versions": [
"3.8.2+dfsg-3"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-59880.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "node-immutable",
"binary_version": "3.8.2+dfsg-3"
}
]
}
},
{
"ranges": [
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"package": {
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"purl": "pkg:deb/ubuntu/node-immutable?arch=source&distro=jammy",
"ecosystem": "Ubuntu:22.04:LTS"
},
"versions": [
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"4.0.0-1",
"4.0.0-2"
],
"database_specific": {
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"ecosystem_specific": {
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},
{
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"package": {
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"purl": "pkg:deb/ubuntu/node-immutable?arch=source&distro=noble",
"ecosystem": "Ubuntu:24.04:LTS"
},
"versions": [
"4.1.0-3",
"4.3.4-1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-59880.json"
},
"ecosystem_specific": {
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{
"binary_name": "node-immutable",
"binary_version": "4.3.4-1"
}
]
}
},
{
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],
"package": {
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"purl": "pkg:deb/ubuntu/node-immutable?arch=source&distro=questing",
"ecosystem": "Ubuntu:25.10"
},
"versions": [
"4.3.4-1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-59880.json"
},
"ecosystem_specific": {
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"package": {
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"purl": "pkg:deb/ubuntu/node-immutable?arch=source&distro=stonking",
"ecosystem": "Ubuntu:26.10"
},
"versions": [
"4.3.8-2",
"4.3.9-1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-59880.json"
},
"ecosystem_specific": {
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{
"binary_name": "node-immutable",
"binary_version": "4.3.9-1"
}
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}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
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"package": {
"name": "node-immutable",
"purl": "pkg:deb/ubuntu/node-immutable?arch=source&distro=resolute",
"ecosystem": "Ubuntu:26.04:LTS"
},
"versions": [
"4.3.4-1",
"4.3.8-2"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-59880.json"
},
"ecosystem_specific": {
"binaries": [
{
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]
}
}
],
"modified": "2026-10-17T12:59:14.411786622Z",
"provider": "osv",
"upstream": [
"CVE-2026-59880"
],
"references": [
"https://ubuntu.com/security/CVE-2026-59880",
"https://www.cve.org/CVERecord?id=CVE-2026-59880",
"https://github.com/immutable-js/immutable-js/security/advisories/GHSA-xvcm-6775-5m9r"
]
},
"related_cves": [
{
"value": "CVE-2026-59880",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 359522,
"published_at": "2026-07-08T16:16:00+00:00"
}