ubuntu-cve-2026-8161
Vulnerability from osv_ubuntu
Published
2026-05-12 10:16
Modified
2026-06-24 08:58
Summary
Details
multiparty@4.2.3 and lower versions are vulnerable to denial of service via uncaught exception. By sending a multipart/form-data request with a field name that collides with an inherited Object.prototype property such as proto, constructor, or toString, the parser invokes .push() on the inherited prototype value rather than an array, throwing a TypeError that propagates as an uncaught exception and crashes the process. Impact: any service accepting multipart uploads via multiparty is affected. Workarounds: none. Upgrade to multiparty@4.3.0 or higher.
Severity
7.5 (High)
N/A (UNKNOWN)
References
{
"affected": [
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "node-multiparty",
"binary_version": "4.0.0-1"
}
]
},
"package": {
"ecosystem": "Ubuntu:16.04:LTS",
"name": "node-multiparty",
"purl": "pkg:deb/ubuntu/node-multiparty@4.0.0-1?arch=source\u0026distro=xenial"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"4.0.0-1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "node-multiparty",
"binary_version": "4.0.0-1ubuntu1"
}
]
},
"package": {
"ecosystem": "Ubuntu:18.04:LTS",
"name": "node-multiparty",
"purl": "pkg:deb/ubuntu/node-multiparty@4.0.0-1ubuntu1?arch=source\u0026distro=bionic"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"4.0.0-1",
"4.0.0-1ubuntu1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "node-multiparty",
"binary_version": "4.2.1-2"
}
]
},
"package": {
"ecosystem": "Ubuntu:20.04:LTS",
"name": "node-multiparty",
"purl": "pkg:deb/ubuntu/node-multiparty@4.2.1-2?arch=source\u0026distro=focal"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"4.2.1-1",
"4.2.1-2"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "node-multiparty",
"binary_version": "4.2.2-3"
}
]
},
"package": {
"ecosystem": "Ubuntu:22.04:LTS",
"name": "node-multiparty",
"purl": "pkg:deb/ubuntu/node-multiparty@4.2.2-3?arch=source\u0026distro=jammy"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"4.2.2-2",
"4.2.2-3"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "node-multiparty",
"binary_version": "4.2.3-2"
}
]
},
"package": {
"ecosystem": "Ubuntu:24.04:LTS",
"name": "node-multiparty",
"purl": "pkg:deb/ubuntu/node-multiparty@4.2.3-2?arch=source\u0026distro=noble"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"4.2.3-2"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "node-multiparty",
"binary_version": "4.2.3-3"
}
]
},
"package": {
"ecosystem": "Ubuntu:25.10",
"name": "node-multiparty",
"purl": "pkg:deb/ubuntu/node-multiparty@4.2.3-3?arch=source\u0026distro=questing"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"4.2.3-2",
"4.2.3-3"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "node-multiparty",
"binary_version": "4.2.3-5"
}
]
},
"package": {
"ecosystem": "Ubuntu:26.04:LTS",
"name": "node-multiparty",
"purl": "pkg:deb/ubuntu/node-multiparty@4.2.3-5?arch=source\u0026distro=resolute"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"4.2.3-3",
"4.2.3-4build1",
"4.2.3-5"
]
}
],
"aliases": [],
"details": "multiparty@4.2.3 and lower versions are vulnerable to denial of service via uncaught exception. By sending a multipart/form-data request with a field name that collides with an inherited Object.prototype property such as __proto__, constructor, or toString, the parser invokes .push() on the inherited prototype value rather than an array, throwing a TypeError that propagates as an uncaught exception and crashes the process. Impact: any service accepting multipart uploads via multiparty is affected. Workarounds: none. Upgrade to multiparty@4.3.0 or higher.",
"id": "UBUNTU-CVE-2026-8161",
"modified": "2026-06-24T08:58:44Z",
"published": "2026-05-12T10:16:00Z",
"references": [
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2026-8161"
},
{
"type": "REPORT",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-8161"
},
{
"type": "REPORT",
"url": "https://github.com/pillarjs/multiparty/security/advisories/GHSA-qxch-whhj-8956"
}
],
"related": [],
"schema_version": "1.7.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
],
"upstream": [
"CVE-2026-8161"
]
}
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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
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- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
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