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CVE-2026-3520

Published: Mar 4, 2026

Modified: Mar 4, 2026

PUBLISHED

Description

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.

Vendor	Product	Versions
expressjs	multer	affected `0 - < 2.1.1`

Weaknesses (CWE)

References

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

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

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

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

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