Vulnerability · Published Sep 14, 2026 · Assigned by openjs
CVE-2026-88932multer vulnerable to Denial of Service via orphaned disk writes on aborted uploads
Medium 5.3
In plain English
A medium-severity uncontrolled resource consumption in multer from multer. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 45% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
multer is a Node.js middleware for handling multipart/form-data uploads. In versions 2.2.0 through 2.3.0, when a request using disk storage is aborted mid-upload, file writes that complete after multer has already run its abort cleanup are not removed, so each aborted upload can leave an orphaned file on disk. A remote unauthenticated attacker can repeatedly start and abort uploads to accumulate orphaned files and exhaust disk space, causing a denial of service. The issue is fixed in multer 2.4.0, and users should upgrade to 2.4.0 or later.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:14 | node-multer | 2.4.0+~cs3.2.0-1 | DEBIAN-CVE-2026-88932 |
| npm | multer | 2.4.0 | GHSA-3pph-fpjx-jg34 |
Affected products (as reported)
Weakness: CWE-400, CWE-459 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L