CVE-2026-88932
multer vulnerable to Denial of Service via orphaned disk writes on aborted uploads
CVSS Score
5.3
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-400 CWE-459 |
| Vendor | multer |
| Product | multer |
| Published | Sep 14, 2026 |
| Last Updated | Sep 14, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
Affected Versions
multer / multer
2.2.0 < 2.4.0
References
Credits
🔍 euriconicacio UlisesGascon bjohansebas