---
id: CVE-2026-87908
title: multiparty is a Node.js library for parsing multipart/form-data request bodies
summary: >-
  multiparty is a Node.js library for parsing multipart/form-data request
  bodies. In versions from 2.1.0 up to but not including 4.3.1, the parser does
  not bound the amount of memory used while accumulating the headers of a single
  multipar…
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'
cwe:
  - CWE-400
  - CWE-770
  - CWE-1050
vendor: multiparty
product: multiparty
affected:
  - multiparty >= 2.1.0 < 4.3.1
published: '2026-09-11'
updated: '2026-09-16'
sourceUpdated: '2026-09-16T19:40:00.317'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-87908'
references:
  - url: 'https://cna.openjsf.org/security-advisories.html'
    label: ce714d77-add3-4f53-aff5-83d477b104bb
  - url: >-
      https://github.com/pillarjs/multiparty/security/advisories/GHSA-5h46-2939-q3wh
    label: ce714d77-add3-4f53-aff5-83d477b104bb
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-87908.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-87908'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2531767'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-87908'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-87908'
tags:
  - nvd
  - cve.org
  - csaf
  - vex
  - red-hat
epss: 0.00297
epssPercentile: 0.22604
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: partial
  timestamp: '2026-09-11T15:53:17.487807Z'
ingestedAt: '2026-09-11T16:45:47.860Z'
---

## Overview

multiparty is a Node.js library for parsing multipart/form-data request bodies. In versions from 2.1.0 up to but not including 4.3.1, the parser does not bound the amount of memory used while accumulating the headers of a single multipart part. An unauthenticated attacker can send a single request whose part carries a very large volume of header bytes, forcing the parser to buffer all of them and exhausting the process memory, which crashes the server. This is a denial of service with no confidentiality or integrity impact. The issue is fixed in multiparty 4.3.1, which caps the size of the accumulated part headers. Users should upgrade to multiparty 4.3.1 or later.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

## Vendor advisories

- **Red Hat VEX** · Important · affected: Red Hat Fuse 7 · no fix planned: Red Hat Fuse 7 · updated 2026-09-23 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-87908.json)