# CVE-2026-3304

## Summary

- **CVE ID:** CVE-2026-3304
- **Severity:** HIGH
- **CVSS Score:** 8.7 (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)
- **CWE:** CWE-459
- **Published:** Feb 27, 2026
- **Last Modified:** Jul 15, 2026

## 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.

## Affected Products

- expressjs — multer (0.0.0)

## References

- [CNA](https://github.com/expressjs/multer/security/advisories/GHSA-xf7r-hgr6-v32p)
- [CNA](https://www.cve.org/CVERecord?id=CVE-2026-3304)
- [CNA](https://github.com/expressjs/multer/commit/739919097dde3921ec31b930e4b9025036fa74ee)
- [CNA](https://cna.openjsf.org/security-advisories.html)
- [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://access.redhat.com/errata/RHSA-2026:6174)
- [redhat-SADP](https://access.redhat.com/errata/RHSA-2026:6802)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.66%
- **EPSS Percentile:** 49.5

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-10._