CVE-2026-5038
Multer vulnerable to Denial of Service via incomplete cleanup of aborted uploads
5.3
MEDIUM
CVSS 3.1
Description
### Impact A vulnerability in Multer allows an attacker to trigger a Denial of Service (DoS) by aborting or sending malformed multipart uploads, causing orphaned partial files to accumulate on disk when using diskStorage. ### Patches Users should upgrade to `2.2.0`, `3.0.0-alpha.2` or higher ### Workarounds None
How to fix CVE-2026-5038
To remediate CVE-2026-5038, upgrade the affected package to a fixed version below.
- npm/multer—upgrade to 2.2.0 or later
Is CVE-2026-5038 being exploited?
No exploitation signal available. Neither CISA KEV nor a current EPSS score has been published for CVE-2026-5038.
Affected packages (1)
- >= 2.0.0-alpha.1, < 2.2.0
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L |