CVE-2026-3520
HIGHMulter < 2.1.1 - Denial of Service via Malformed Request
Title source: llmDescription
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.
References (9)
Core 9
Core References
Vendor Advisory
https://access.redhat.com/errata/RHSA-2026:6174
Vendor Advisory
https://access.redhat.com/errata/RHSA-2026:6802
Vendor Advisory
https://access.redhat.com/security/cve/CVE-2026-3520
Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2444584
Various Sources
https://www.cve.org/CVERecord?id=CVE-2026-3520
Various Sources
https://cna.openjsf.org/security-advisories.html
Scores
CVSS v3
7.5
EPSS
0.0071
EPSS Percentile
50.0%
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-674
CWE-770
Status
published
Products (2)
expressjs/multer
< 2.1.1 (2 CPE variants)
npm/multer
0 - 2.1.1npm
Published
Mar 04, 2026
Tracked Since
Mar 05, 2026