CVE-2026-19474@fastify/multipart vulnerable to Denial of Service via temporary file leak on aborted upload
Updated under an hour ago ()
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It affects @fastify/multipart and 1 other product. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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@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.
- CVSS
- 7.5 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Weakness (CWE)
- CWE-459, CWE-770
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- openjs
- NVD analysis
- Analyzed
- Record last updated
- Aug 17, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
@fastify/multipart @fastify/multipart fastify_multipart:fastify_multipart (from the name) | from 3.0.0 before 10.1.1; 10.1.1 not affected | CNA record |
fastify fastify-multipart fastify:fastify-multipart | from 3.0.0 before 10.1.1 | NVD |
References
- https://github.com/fastify/fastify-multipart/security/advisories/GHSA-62qx-hpj5-j6hcmitigation, vendor-advisory
- https://cna.openjsf.org/security-advisories.htmlthird-party-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.