Uncaught Exception Affecting multer package, versions >=2.0.0 <2.5.0
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Test your applications- Snyk IDSNYK-JS-MULTER-21431602
- published22 Oct 2026
- disclosed22 Oct 2026
- creditSantiago Habib
Introduced: 22 Oct 2026
NewCVE-2026-113872 (opens in a new tab)Common Vulnerabilities and Exposures (CVE) are common identifiers for publicly known security vulnerabilities
Common Weakness Enumeration (CWE) is a category system for software weaknesses
How to fix?
Upgrade multer to version 2.5.0 or higher.
Overview
Affected versions of this package are vulnerable to Uncaught Exception via a late busboy error event emitted after teardown in lib/make-middleware.js. When an asynchronous fileFilter is in use, a single request can trigger an unhandled error event on the busboy instance after the request has already finished and all listeners have been removed, crashing the Node.js process.
Note: This is only exploitable when multer is configured with an asynchronous fileFilter.