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.
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History
Fri, 11 Sep 2026 07:00:00 +0000
| Type | Values Removed | Values Added |
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| Description | 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. | |
| Title | multiparty vulnerable to Denial of Service via unbounded part-header accumulation | |
| Weaknesses | CWE-400 CWE-770 |
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cvssV3_1
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Status: PUBLISHED
Assigner: openjs
Published: 2026-09-11T06:37:51.216Z
Updated: 2026-09-11T15:54:32.991Z
Reserved: 2026-09-09T15:07:30.466Z
Link: CVE-2026-87908
No data.
Status : Received
Published: 2026-09-11T07:16:47.937
Modified: 2026-09-11T16:17:48.057
Link: CVE-2026-87908
No data.