CVE-2026-3520CWE-674

Multer vulnerable to Denial of Service via uncontrolled recursion

High · published March 4, 2026

CVSS v4.0
8.7
EPSS
1%
Percentile
62.4
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 2.1.1 allows an attacker to trigger a Denial of Service (DoS) by sending malformed requests, potentially causing stack overflow. Users should upgrade to version 2.1.1 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
0.00998 · 62.4th percentile
Weakness
CWE-674 · Uncontrolled Recursion
Published
2026-03-04T16:17Z
EPSS history
Timeline
  • 04 MAR 16:17Z
    Multer vulnerable to Denial of Service via uncontrolled recursion
    cvelistv5