Description
Multer is a node.js middleware for handling `multipart/form-data`. A vulnerability that is present starting in version 1.4.4-lts.1 and prior to version 2.0.0 allows an attacker to trigger a Denial of Service (DoS) by sending a malformed multi-part upload request. This request causes an unhandled exception, leading to a crash of the process. Users should upgrade to version 2.0.0 to receive a patch. No known workarounds are available.
Scores
CVSS v3
7.5
EPSS
0.0004
EPSS Percentile
12.2%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
yes
Technical Impact
partial
Details
CWE
CWE-248
Status
published
Products (2)
expressjs/multer
>=1.4.4-lts.1, <2.0.0
npm/multer
1.4.4-lts.1 - 2.0.0npm
Published
May 19, 2025
Tracked Since
Feb 18, 2026