CVE-2026-3304 Details
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.
A denial-of-service vulnerability has been identified in Multer, a Node.js middleware for processing multipart/form-data. This issue affects Multer versions prior to 2.1.0. The vulnerability allows attackers to send malformed requests that can lead to resource exhaustion, causing a denial-of-service condition.
Users are advised to upgrade to Multer version 2.1.0 or later, where this vulnerability has been patched.
Metrics
CVSS 4.0 Severity and Vector Strings:
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Feb 27, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://access.redhat.com/errata/RHSA-2026:6174 | redhat-SADP | |
| https://access.redhat.com/errata/RHSA-2026:6802 | redhat-SADP | |
| https://access.redhat.com/security/cve/CVE-2026-3304 | redhat-SADP | |
| https://bugzilla.redhat.com/show_bug.cgi?id=2443353 | redhat-SADP | |
| https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-3304.json | redhat-SADP | |
| https://cna.openjsf.org/security-advisories.html | openjs | Vendor Advisory |
| https://github.com/expressjs/multer/commit/739919097dde3921ec31b930e4b9025036fa74ee | openjs | Patch |
| https://github.com/expressjs/multer/security/advisories/GHSA-xf7r-hgr6-v32p | openjs | PatchVendor Advisory |
| https://www.cve.org/CVERecord?id=CVE-2026-3304 | openjs | VDB Entry |
Weakness Enumeration
Affected Products
| Product | Versions |
|---|---|
| expressjs multer | < 2.1.0 |
CPE
Remediation
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Change History
6 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jul 15, 2026 | CVE Modified | redhat-SADP |
| Jun 30, 2026 | CVE Modified | redhat-SADP |
| Jun 17, 2026 | CVE Modified | openjs |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Mar 19, 2026 | Initial Analysis | [email protected] |
| Feb 27, 2026 | New CVE Received | openjs |