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CVE-2026-87908

CVE-2026-87908 · multiparty vulnerable to Denial of Service via unbounded part-header accumulation

This page contains facts from public vulnerability sources. Check the original advisory before updating.

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.

CVSS 7.5 · High · EPSS 0.5% · Fix available

Published
Updated

Stack: system

Affected products and versions

  • multiparty

    Versions
    • ≥ 2.1.0, < 4.3.1: Affected (semver)
    • 4.3.1: Not affected (semver)

    Update to 4.3.1

  • node-multiparty Debian:12

    Versions
    • 4.2.3-2
    • 4.2.3-3
    • 4.2.3-4
    • 4.2.3-5
    • 4.3.0+~4.2.1-1
    • 4.3.0-1
    • 4.3.1+~4.2.1-1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • node-multiparty Debian:13

    Versions
    • 4.2.3-3
    • 4.2.3-4
    • 4.2.3-5
    • 4.3.0+~4.2.1-1
    • 4.3.0-1
    • 4.3.1+~4.2.1-1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • node-multiparty Debian:14

    Versions
    • 4.2.3-3
    • 4.2.3-4
    • 4.2.3-5
    • 4.3.0+~4.2.1-1
    • 4.3.0-1
    Affected ranges
    • ECOSYSTEM: < 4.3.1+~4.2.1-1

    Update to 4.3.1+~4.2.1-1

  • node-multiparty Ubuntu:16.04:LTS

    Versions
    • 4.0.0-1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • node-multiparty Ubuntu:18.04:LTS

    Versions
    • 4.0.0-1
    • 4.0.0-1ubuntu1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • node-multiparty Ubuntu:20.04:LTS

    Versions
    • 4.2.1-1
    • 4.2.1-2
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • node-multiparty Ubuntu:22.04:LTS

    Versions
    • 4.2.2-2
    • 4.2.2-3
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • node-multiparty Ubuntu:24.04:LTS

    Versions
    • 4.2.3-2
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • node-multiparty Ubuntu:26.10

    Versions
    • 4.2.3-5
    • 4.3.0+~4.2.1-1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • node-multiparty Ubuntu:26.04:LTS

    Versions
    • 4.2.3-3
    • 4.2.3-4build1
    • 4.2.3-5
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

Original sources

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