CVE-2026-19474
HighCVSS 7.5Exploitation Probability (EPSS)
Low risk20th percentile - higher than 20% of all known CVEs
Summary
In @fastify/multipart, a multipart form-data parser for Fastify, 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 during processing. An unauthenticated client can repeat this to cause persistent disk consumption and denial of service. The issue is fixed in version 10.1.1.
Risk Assessment
The risk includes potential disk exhaustion by a remote attacker, leading to denial of service.
Recommendation
It is recommended to upgrade @fastify/multipart to version 10.1.1 or later.
Original NVD description (English source)
@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.