DEBIAN-CVE-2026-8161
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.
DEBIAN-CVE-2026-8161
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: osv:DEBIAN-CVE-2026-8161
node-multiparty
Source reference: /affected/0/package/name
- Affected versions
- 4.2.3-2
Source reference:
/affected/0/versions4.2.3-3Source reference:
/affected/0/versions4.2.3-4Source reference:
/affected/0/versions4.2.3-5Source reference:
/affected/0/versions4.3.0+~4.2.1-1Source reference:
/affected/0/versions4.3.0-1Source reference:
/affected/0/versions4.3.1+~4.2.1-1Source reference:
/affected/0/versions - Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
node-multiparty
Source reference: /affected/1/package/name
- Affected versions
- 4.2.3-3
Source reference:
/affected/1/versions4.2.3-4Source reference:
/affected/1/versions4.2.3-5Source reference:
/affected/1/versions4.3.0+~4.2.1-1Source reference:
/affected/1/versions4.3.0-1Source reference:
/affected/1/versions4.3.1+~4.2.1-1Source reference:
/affected/1/versions - Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
node-multiparty
Source reference: /affected/2/package/name
- Affected versions
- 4.2.3-3
Source reference:
/affected/2/versions4.2.3-4Source reference:
/affected/2/versions4.2.3-5Source reference:
/affected/2/versions - Fixed versions
- 4.3.0-1
Source reference:
/affected/2/ranges - Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "node-multiparty",
"purl": "pkg:deb/debian/node-multiparty?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"versions": [
"4.2.3-2",
"4.2.3-3",
"4.2.3-4",
"4.2.3-5",
"4.3.0+~4.2.1-1",
"4.3.0-1",
"4.3.1+~4.2.1-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-8161.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "node-multiparty",
"purl": "pkg:deb/debian/node-multiparty?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"versions": [
"4.2.3-3",
"4.2.3-4",
"4.2.3-5",
"4.3.0+~4.2.1-1",
"4.3.0-1",
"4.3.1+~4.2.1-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-8161.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "4.3.0-1"
}
]
}
],
"package": {
"name": "node-multiparty",
"purl": "pkg:deb/debian/node-multiparty?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"versions": [
"4.2.3-3",
"4.2.3-4",
"4.2.3-5"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-8161.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
]Publisher severity
No explicit severity was provided.
- Event
- #58507 · Revision 1
- Added to Heist Feed
- Publisher date