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.
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Mon, 14 Sep 2026 09:00:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| 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. | |
| Title | multer vulnerable to Denial of Service via orphaned disk writes on aborted uploads | |
| Weaknesses | CWE-400 CWE-459 |
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cvssV3_1
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Status: PUBLISHED
Assigner: openjs
Published:
Updated: 2026-09-14T10:29:12.674Z
Reserved: 2026-09-10T14:28:44.035Z
Link: CVE-2026-88932
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Status : Received
Published: 2026-09-14T09:17:01.630
Modified: 2026-09-14T09:17:01.630
Link: CVE-2026-88932
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