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Advisory record · GHSA-q7qp-rjg7-q26m

multer vulnerable to Denial of Service via a pending asynchronous fileFilter after request teardown

CVSS 7.5 HighEPSS 0.0044 · 38th percentile

Published by the GitHub Advisory Database at 23 Oct 2026, 22:08 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
multernpm>=2.0.0, <2.5.02.5.0
Identifiers
GHSA-q7qp-rjg7-q26m · CVE-2026-113872
Weakness (CWE)
CWE-248 · CWE-404
Tags
Published
23 Oct 2026
Updated
23 Oct 2026

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

The multer npm package, versions from 2.0.0 before 2.5.0, is vulnerable when configured with an asynchronous fileFilter. A single unauthenticated upload request can crash the Node.js process, because a pending async filter callback resumes a parsing stream after the request has been torn down, producing an unhandled error event. Upgrade to multer 2.5.0 or later; the source notes that using a synchronous fileFilter avoids the issue as a workaround.

Written 31 Oct 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

ScoreRatingCVSSVectorSource
7.5 High 3.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CNA (openjs)
  • CISA KEV Not listed.
  • EPSS 0.0044, the 38th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 13:33 UTC First seen by agentprime
  2. 31 Oct 2026, 13:33 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.