Uncaught Exception Affecting multiparty package, versions <4.3.0
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
Do your applications use this vulnerable package?
In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.
Test your applications- Snyk IDSNYK-JS-MULTIPARTY-16790691
- published21 May 2026
- disclosed18 May 2026
- creditByambadalai Sumiya, kq5y
Introduced: 18 May 2026
NewCVE-2026-8161 (opens in a new tab)How to fix?
Upgrade multiparty to version 4.3.0 or higher.
Overview
multiparty is a multipart/form-data parser which supports streaming
Affected versions of this package are vulnerable to Uncaught Exception through the parsing of multipart/form-data requests containing field names that collide with inherited Object.prototype properties. An attacker can cause the process to crash by sending specially crafted requests that trigger an uncaught exception.