CVE-2026-2359: Expressjs Multer

High severity, CVSS 7.5. EPSS: 0.7% chance of exploitation in the next 30 days.

Multer is a node.js middleware for handling `multipart/form-data`. A vulnerability in Multer prior to version 2.1.0 allows an attacker to trigger a Denial of Service (DoS) by dropping connection during file upload, potentially causing resource exhaustion. Users should upgrade to version 2.1.0 to receive a patch. No known workarounds are available.

Affected products

• Expressjs Multer: before 2.1.0 (fixed in 2.1.0)

Published 2026-02-27. Last modified 2026-07-15.