What is CVE-2026-5038?

CVE-2026-5038 is a medium-severity vulnerability in Expressjs Multer, classified under Incomplete Cleanup. CVSS score: 5.3/10. Published 2026-06-15.

How severe is CVE-2026-5038?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Vulnerability in Expressjs Multer

CVE-2026-5038

Impact: multer versions 2.0.0-alpha.1 through 2.1.1 and 3.0.0-alpha.1 are vulnerable to a Denial of Service when using diskStorage. Aborted or malformed multipart uploads leave orphaned partial files on disk because the Readable.pipe() cal…

EPSS: 0.003 (20.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.

Affected products

Expressjs Multer — versions 3.0.0
Multer — versions 2.0.0-alpha.1, 2.2.0, 3.0.0-alpha.1

Weakness classification (CWE)

CWE-459 — Incomplete Cleanup

References

ce714d77-add3-4f53-aff5-83d477b104bb (Vendor Advisory)
ce714d77-add3-4f53-aff5-83d477b104bb (Vendor Advisory)

Frequently asked questions

What is CVE-2026-5038?: CVE-2026-5038 is a medium-severity vulnerability in Expressjs Multer, classified under Incomplete Cleanup. CVSS score: 5.3/10. Published 2026-06-15.
How severe is CVE-2026-5038?: Medium severity. CVSS v3 base score is 5.3 out of 10.