CyberRota Analysis
AI-GeneratedThe @fastify/busboy multipart form-data parser is vulnerable in versions 1.0.0 through 3.2.0, allowing attackers to crash the parser and cause an unauthenticated denial of service by submitting specially crafted part headers that exploit prototype inheritance. This vulnerability can lead to a TypeError, terminating the Node.js process when used in direct write or end scenarios. Organizations using affected versions should prioritize upgrading to 3.2.1 to mitigate this risk.
Public Exploit Signal
A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.
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Original NVD Description
@fastify/busboy is a multipart form-data parser. In versions 1.0.0 through 3.2.0, an attacker who can submit multipart form-data can crash the parser by sending a part header whose name is a prototype-inherited property such as __proto__ or constructor. The internal header parser stores headers in a plain JavaScript object and assumes each value is an array, so an inherited property name resolves to a truthy non-array value and triggers a TypeError. In the common pipe integration the failure surfaces as an error event, but in direct write or end usage the exception is thrown synchronously and can terminate the Node.js process, causing an unauthenticated denial of service. The issue is fixed in @fastify/busboy 3.2.1, which creates the header object with a null prototype. Users should upgrade to 3.2.1.