CVE-2026-3304

EPSS 0.02%

Multer vulnerable to Denial of Service via incomplete cleanup

Published: 3/1/2026Modified: 3/6/2026

Also known as:GHSA-xf7r-hgr6-v32pCGA-j49g-m3c4-p9gr

Description

### Impact A vulnerability in Multer versions < 2.1.0 allows an attacker to trigger a Denial of Service (DoS) by sending malformed requests, potentially causing resource exhaustion. ### Patches Users should upgrade to `2.1.0` ### Workarounds None

Affected packages (1)

npm/multerfrom 0, < 2.1.0

CVSS scores

Source	Version	Severity	Vector
osv	CVSS 4.0	—	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

References (6)

ADVISORYhttps://nvd.nist.gov/vuln/detail/CVE-2026-3304
PATCHhttps://github.com/expressjs/multer
WEBhttps://cna.openjsf.org/security-advisories.html
WEBhttps://github.com/expressjs/multer/commit/739919097dde3921ec31b930e4b9025036fa74ee
WEBhttps://github.com/expressjs/multer/security/advisories/GHSA-xf7r-hgr6-v32p
WEBhttps://www.cve.org/CVERecord?id=CVE-2026-3304