CVE-2026-8161multiparty vulnerable to Denial of Service via Prototype Pollution leading to Uncaught Exception

Beschreibung

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.

Daten: CVE.org, NVD, CISA KEV, FIRST EPSS, Ubuntu. Wiedergegeben wie in der Quelle, auf Englisch.

Betroffene Produkte und Versionen

Referenzen und Patches

• https://github.com/pillarjs/multiparty/security/advisories/GHSA-qxch-whhj-8956 Vendor Advisory
• https://cna.openjsf.org/security-advisories.html Third Party Advisory