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Tracking
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Thu, 13 Aug 2026 15:30:00 +0000
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ssvc
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Thu, 13 Aug 2026 11:00:00 +0000
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| First Time appeared |
Fastify
Fastify busboy |
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| Vendors & Products |
Fastify
Fastify busboy |
Thu, 13 Aug 2026 09:00:00 +0000
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| Description | @fastify/busboy is a multipart form-data parser. In versions 1.0.0 through 3.2.0, an attacker who can submit multipart form-data can crash the parser by sending a part header whose name is a prototype-inherited property such as __proto__ or constructor. The internal header parser stores headers in a plain JavaScript object and assumes each value is an array, so an inherited property name resolves to a truthy non-array value and triggers a TypeError. In the common pipe integration the failure surfaces as an error event, but in direct write or end usage the exception is thrown synchronously and can terminate the Node.js process, causing an unauthenticated denial of service. The issue is fixed in @fastify/busboy 3.2.1, which creates the header object with a null prototype. Users should upgrade to 3.2.1. | |
| Title | @fastify/busboy vulnerable to Denial of Service via prototype-named multipart part header | |
| Weaknesses | CWE-754 | |
| References |
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| Metrics |
cvssV3_1
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Status: PUBLISHED
Assigner: openjs
Published:
Updated: 2026-08-13T14:25:29.262Z
Reserved: 2026-08-10T15:38:12.624Z
Link: CVE-2026-19481
Updated: 2026-08-13T14:25:23.905Z
Status : Received
Published: 2026-08-13T09:17:12.573
Modified: 2026-08-13T15:19:38.170
Link: CVE-2026-19481
No data.
OpenCVE Enrichment
Updated: 2026-08-13T11:00:12Z