Resource exhaustion in Multer
CVE-2026-5079
Impact: multer versions 1.0.0 through 2.1.1 and 3.0.0-alpha.1 are vulnerable to a Denial of Service via deeply nested field names in multipart form data. The append-field dependency parses bracket notation in field names with no limit on n…
Vulnerability class: DoS (Denial of Service)
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
Affected products
- Multer — versions 1.0.0, 2.2.0, 3.0.0-alpha.1
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2026-5079?
- CVE-2026-5079 is a high-severity vulnerability in Multer, classified under Uncontrolled Resource Consumption. CVSS score: 7.5/10. Published 2026-06-15.
- How severe is CVE-2026-5079?
- High severity. CVSS v3 base score is 7.5 out of 10.