CVE-2026-8161

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Source
https://cve.org/CVERecord?id=CVE-2026-8161
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-8161.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-8161
Aliases
Downstream
Published
2026-05-12T08:50:37.685Z
Modified
2026-07-08T08:12:41.261572762Z
Severity
  • 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
Summary
multiparty vulnerable to Denial of Service via Prototype Pollution leading to Uncaught Exception
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.

Database specific 
{
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/8xxx/CVE-2026-8161.json",
    "cna_assigner": "openjs",
    "cwe_ids": [
        "CWE-1321",
        "CWE-248"
    ]
}
References

Affected packages

Git / github.com/pillarjs/multiparty

Affected ranges

Type
GIT
Repo
https://github.com/pillarjs/multiparty
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
f7963dbfb8c66764790790cf79eb0992c0e45ff0
Database specific 
{
    "cpe": "cpe:2.3:a:pillarjs:multiparty:*:*:*:*:*:node.js:*:*",
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "last_affected": "4.2.3"
        },
        {
            "fixed": "4.3.0"
        }
    ],
    "source": [
        "AFFECTED_FIELD",
        "CPE_RANGE"
    ]
}

Affected versions

2.*
2.0.0
2.1.0
2.1.1
2.1.2
2.1.3
2.1.4
2.1.5
2.1.6
2.1.7
2.1.8
2.1.9
2.2.0
3.*
3.0.0
3.1.0
3.1.1
3.1.2
3.2.0
3.2.1
3.2.2
3.2.3
3.2.4
3.2.5
3.2.6
3.2.7
3.2.8
3.2.9
3.3.0
3.3.1
3.3.2
4.*
4.0.0
4.1.0
4.1.1
4.1.2
4.1.3
4.1.4
4.2.0
4.2.1
4.2.2
4.2.3
v0.*
v0.1.0
v0.2.0
v0.3.0
v0.4.0
v0.5.0
v0.6.0
v0.7.0
v0.8.0
v0.9.0
v0.9.1
v0.9.10
v0.9.11
v0.9.2
v0.9.3
v0.9.4
v0.9.5
v0.9.6
v0.9.7
v0.9.8
v0.9.9
v1.*
v1.0.0
v1.0.1
v1.0.10
v1.0.11
v1.0.2
v1.0.3
v1.0.4
v1.0.5
v1.0.6
v1.0.7
v1.0.8
v1.0.9

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-8161.json"