GHSA-qxch-whhj-8956

Source

https://github.com/advisories/GHSA-qxch-whhj-8956

Import Source

https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/05/GHSA-qxch-whhj-8956/GHSA-qxch-whhj-8956.json

JSON Data

https://api.osv.dev/v1/vulns/GHSA-qxch-whhj-8956

Aliases

CVE-2026-8161

Published

2026-05-18T17:35:01Z

Modified

2026-05-18T17:48:39.254566Z

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: Denial of Service via Prototype Pollution leads to Uncaught Exception

Details

Impact

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 (e.g., __proto__, constructor, 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. Any service accepting multipart uploads via multiparty is affected.

Patches

Users should upgrade to multiparty@4.3.0 or higher.

Workarounds

None.

Database specific

{
    "cwe_ids": [
        "CWE-1321",
        "CWE-248"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-05-18T17:35:01Z",
    "nvd_published_at": "2026-05-12T10:16:48Z",
    "severity": "HIGH"
}

References

Affected packages

npm / multiparty

Package

Name: multiparty; View open source insights on deps.dev
Purl: pkg:npm/multiparty

Affected ranges

Type: SEMVER
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

4.3.0

Database specific

source

"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/05/GHSA-qxch-whhj-8956/GHSA-qxch-whhj-8956.json"

last_known_affected_version_range

"<= 4.2.3"