CVE-2026-3520

HIGH8.7

Multer vulnerable to Denial of Service via uncontrolled recursion

Published Mar 4, 2026

Modified 1 weeks ago

Details

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

WEB

https://cna.openjsf.org/security-advisories.html

WEB

https://github.com/expressjs/multer/commit/7e66481f8b2e6c54b982b34c152479e096ce2752

WEB

https://github.com/expressjs/multer/security/advisories/GHSA-5528-5vmv-3xc2

ADVISORY

https://www.cve.org/CVERecord?id=CVE-2026-3520

CVSS Analysis

CVSS v4.0

8.7