IA Squad
SearchEN
js · multerHeads-up

Multer DoS via Orphaned Partial Files

A vulnerability in Multer allows an attacker to cause Denial of Service (DoS) by aborting or sending malformed multipart uploads, leading to orphaned partial fi

18 Jun 2026Read 1 minSeverity: schedule it

What changed

A vulnerability in Multer allows an attacker to cause Denial of Service (DoS) by aborting or sending malformed multipart uploads, leading to orphaned partial files accumulating on disk when using diskStorage.

Who it affects

Users of Multer using diskStorage who accept multipart uploads.

What to do today

Upgrade to version 2.2.0, 3.0.0-alpha.2 or higher.

The trail
Collected Audited Written Published