CVE-2026-3304CWE-459

Multer vulnerable to Denial of Service via incomplete cleanup

High · published February 27, 2026

CVSS v4.0
8.7
EPSS
1%
Percentile
58.7
In the wild
Unconfirmed
What it is

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 sending malformed requests, potentially causing resource exhaustion. Users should upgrade to version 2.1.0 to receive a patch. No known workarounds are available.

The record
Technical detail
CVSS v4.0
8.7 · HIGH
Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
EPSS
0.00881 · 58.7th percentile
Weakness
CWE-459 · Incomplete Cleanup
Published
2026-02-27T15:44Z
EPSS history
Timeline
  • 27 FEB 15:44Z
    Multer vulnerable to Denial of Service via incomplete cleanup
    cvelistv5