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5.3 Medium

multer is a Node.js middleware for handling multipart/form-data uploads.

CVE-2026-88932

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.

Assessment

CVSS
5.3 (v3.1)
Severity
Medium
EPSS
0.53% chance of exploitation in the next 30 days
Known exploited
Not listed in CISA KEV
Exploit availability
Nothing found in Exploit-DB, Metasploit, Nuclei or public PoC repositories
Published
14 September 2026
Last updated
16 September 2026
Affected
multer · multer
Weakness
CWE-400, CWE-459
Assigner
ce714d77-add3-4f53-aff5-83d477b104bb

CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

At the source

References

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