CVE-2026-3520

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2026-3520
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.

7.5 /10

CVSS v3 : HIGH

V3 Legend

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
https://cna.openjsf.org/security-advisories.html Third Party Advisory
https://github.com/expressjs/multer/commit/7e66481f8b2e6c54b982b34c152479e096ce2752 Patch
https://github.com/expressjs/multer/security/advisories/GHSA-5528-5vmv-3xc2 Vendor Advisory
https://www.cve.org/CVERecord?id=CVE-2026-3520 Third Party Advisory
Configurations

Configuration 1 (hide)

cpe:2.3:a:expressjs:multer:*:*:*:*:*:node.js:*:*
History

09 Mar 2026, 18:03

Type Values Removed Values Added
First Time Expressjs multer
Expressjs
CPE cpe:2.3:a:expressjs:multer:*:*:*:*:*:node.js:*:*
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 7.5
Summary
  • (es) Multer es un middleware de node.js para manejar 'multipart/form-data'. Una vulnerabilidad en Multer anterior a la versión 2.1.1 permite a un atacante activar una denegación de servicio (DoS) enviando solicitudes malformadas, lo que podría causar un desbordamiento de pila. Los usuarios deben actualizar a la versión 2.1.1 para recibir un parche. No se conocen soluciones alternativas disponibles.
References () https://cna.openjsf.org/security-advisories.html - () https://cna.openjsf.org/security-advisories.html - Third Party Advisory
References () https://github.com/expressjs/multer/commit/7e66481f8b2e6c54b982b34c152479e096ce2752 - () https://github.com/expressjs/multer/commit/7e66481f8b2e6c54b982b34c152479e096ce2752 - Patch
References () https://github.com/expressjs/multer/security/advisories/GHSA-5528-5vmv-3xc2 - () https://github.com/expressjs/multer/security/advisories/GHSA-5528-5vmv-3xc2 - Vendor Advisory
References () https://www.cve.org/CVERecord?id=CVE-2026-3520 - () https://www.cve.org/CVERecord?id=CVE-2026-3520 - Third Party Advisory

04 Mar 2026, 17:16

Type Values Removed Values Added
New CVE
Information

Published : 2026-03-04 17:16

Updated : 2026-03-09 18:03

NVD link : CVE-2026-3520

Mitre link : CVE-2026-3520

CVE.ORG link : CVE-2026-3520

JSON object : View

Products Affected

expressjs

  • multer
CWE
CWE-674

Uncontrolled Recursion