Unlimited consumption of resources in @fastify/multipart

Description

Impact

The saveRequestFiles function does not delete the uploaded temporary files when user cancels the request.

Patches

Fixed in version 8.3.1 and 9.0.3

Workarounds

Do not use saveRequestFiles.

References

This was identified in https://github.com/fastify/fastify-multipart/issues/546 and fixed in https://github.com/fastify/fastify-multipart/pull/567.

Basic information

Type
reviewed
Severity
high
Advisory on GitHub
Open advisory ↗
Repository advisory
Open repository advisory ↗
Source code
Browse source ↗
Published (advisory)
2025-01-23 18:02:07 UTC
Updated
2025-01-23 23:17:18 UTC
GitHub reviewed
2025-01-23 18:02:07 UTC
NVD published
2025-01-23

EPSS Score

Score Percentile
0.28% 50.84%

CVSS Scores

Base score Version Severity Vector
7.5 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.

Identifiers

CWEs

CWE id Name
CWE-770 Allocation of Resources Without Limits or Throttling

Affected packages (2)

Vulnerable version ranges and first patched releases as published by GitHub.

Ecosystem Package Vulnerable range First patched Vulnerable functions
npm @fastify/multipart <= 8.3.0 8.3.1
npm @fastify/multipart >= 9.0.0, < 9.0.3 9.0.3

References

cvelogic Threat Intelligence