Description
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.
Published: 2026-02-27
Score: 8.7 High
EPSS: < 1% Very Low
KEV: No
Impact: Denial of Service
Action: Immediate Patch
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories
Source ID Title
Github GHSA Github GHSA GHSA-xf7r-hgr6-v32p Multer vulnerable to Denial of Service via incomplete cleanup
History

Thu, 19 Mar 2026 17:30:00 +0000

Type Values Removed Values Added
CPEs cpe:2.3:a:expressjs:multer:*:*:*:*:*:node.js:*:*

Tue, 03 Mar 2026 00:15:00 +0000

Type Values Removed Values Added
References
Metrics threat_severity

None

cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}

threat_severity

Important


Mon, 02 Mar 2026 12:15:00 +0000

Type Values Removed Values Added
First Time appeared Expressjs
Expressjs multer
Vendors & Products Expressjs
Expressjs multer

Fri, 27 Feb 2026 18:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Fri, 27 Feb 2026 16:00:00 +0000

Type Values Removed Values Added
Description 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.
Title Multer vulnerable to Denial of Service via incomplete cleanup
Weaknesses CWE-459
References
Metrics cvssV4_0

{'score': 8.7, 'vector': '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'}


Subscriptions

Expressjs Multer
cve-icon MITRE

Status: PUBLISHED

Assigner: openjs

Published:

Updated: 2026-02-27T17:12:45.375Z

Reserved: 2026-02-26T20:42:41.095Z

Link: CVE-2026-3304

cve-icon Vulnrichment

Updated: 2026-02-27T17:12:37.799Z

cve-icon NVD

Status : Analyzed

Published: 2026-02-27T16:16:26.380

Modified: 2026-03-19T17:28:33.810

Link: CVE-2026-3304

cve-icon Redhat

Severity : Important

Publid Date: 2026-02-27T15:44:37Z

Links: CVE-2026-3304 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-04-16T15:30:06Z

Weaknesses