CVE-2026-3304

8.7 highEPSS 0.7%

High (8.7) in expressjs multer. EPSS 0.7% chance of exploitation in the next 30 days. Fixed in multer 2.1.0.

Multer is a node.js middleware for handling `multipart/form-data`. A vulnerability in Multer prior to version 2.1.0 allows an attacker to trigger a Denial of Service (DoS) by sending malformed requests, potentially causing resource exhaustion. Users should upgrade to version 2.1.0 to receive a patch. No known workarounds are available.

Severity

CVSS 4.0

8.7 high

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

CVSS 3.1

7.5 high

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS: 0.7% chance of exploitation in the next 30 days; higher than 54% of CVEs (scores of 2026-10-31)
CWE: CWE-459
Published: 2026-02-27
Modified: 2026-07-15
Record from: the NVD, synced 2026-10-19

Affected

expressjs:multer

Packages (OSV)

Advisory	Ecosystem	Package	Affected	Fixed in
GHSA-xf7r-hgr6-v32p	npm	multer	<2.1.0	2.1.0

References

https://cna.openjsf.org/security-advisories.html
https://github.com/expressjs/multer/commit/739919097dde3921ec31b930e4b9025036fa74ee
https://github.com/expressjs/multer/security/advisories/GHSA-xf7r-hgr6-v32p
https://www.cve.org/CVERecord?id=CVE-2026-3304
https://access.redhat.com/errata/RHSA-2026:6174

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