Description
@fastify/multipart is a multipart form-data parser for Fastify. In versions from 3.0.0 up to but not including 10.1.1, request.saveRequestFiles() can leave completed temporary files on disk when a client disconnects while the parser is advancing between multipart parts. The iterator rejection that occurs between parts falls outside the per-file cleanup path, so an earlier completed file is never removed. An unauthenticated client can repeat this to cause persistent, linear disk consumption, leading to denial of service. This is an incomplete-fix variant of CVE-2025-24033. The issue is fixed in @fastify/multipart 10.1.1. Users should upgrade to 10.1.1.
Published: 2026-08-15
Score: 7.5 High
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories

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History

Mon, 17 Aug 2026 20:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Mon, 17 Aug 2026 10:45:00 +0000

Type Values Removed Values Added
First Time appeared Fastify
Fastify fastify-multipart
Vendors & Products Fastify
Fastify fastify-multipart

Sat, 15 Aug 2026 13:45:00 +0000

Type Values Removed Values Added
Description @fastify/multipart is a multipart form-data parser for Fastify. In versions from 3.0.0 up to but not including 10.1.1, request.saveRequestFiles() can leave completed temporary files on disk when a client disconnects while the parser is advancing between multipart parts. The iterator rejection that occurs between parts falls outside the per-file cleanup path, so an earlier completed file is never removed. An unauthenticated client can repeat this to cause persistent, linear disk consumption, leading to denial of service. This is an incomplete-fix variant of CVE-2025-24033. The issue is fixed in @fastify/multipart 10.1.1. Users should upgrade to 10.1.1.
Title @fastify/multipart vulnerable to Denial of Service via temporary file leak on aborted upload
Weaknesses CWE-459
CWE-770
References
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}


Subscriptions

Fastify Fastify-multipart
cve-icon MITRE

Status: PUBLISHED

Assigner: openjs

Published:

Updated: 2026-08-17T19:43:19.646Z

Reserved: 2026-08-10T14:46:05.622Z

Link: CVE-2026-19474

cve-icon Vulnrichment

Updated: 2026-08-17T19:43:08.808Z

cve-icon NVD

Status : Received

Published: 2026-08-15T14:17:07.710

Modified: 2026-08-17T20:16:41.673

Link: CVE-2026-19474

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-08-17T10:30:08Z

Weaknesses