expressjs/multer · Security
Multer Vulnerable to Denial of Service via Uncontrolled Recursion
- GHSA ID
- GHSA-5528-5vmv-3xc2
- CVE ID
- CVE-2026-3520
- Severity
- high
- Published
- Updated
- CVSS v4
- 8.7 · CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Description
Impact
A vulnerability in Multer versions < 2.1.1 allows an attacker to trigger a Denial of Service (DoS) by sending malformed requests, potentially causing stack overflow.
Patches
Users should upgrade to 2.1.1
Workarounds
None
Resources
CWEs
- CWE-674 · Uncontrolled Recursion
References
- https://github.com/expressjs/multer/security/advisories/GHSA-5528-5vmv-3xc2 ↗
- https://nvd.nist.gov/vuln/detail/CVE-2026-3520 ↗
- https://github.com/expressjs/multer/commit/7e66481f8b2e6c54b982b34c152479e096ce2752 ↗
- https://cna.openjsf.org/security-advisories.html ↗
- https://www.cve.org/CVERecord?id=CVE-2026-3520 ↗
- https://github.com/advisories/GHSA-5528-5vmv-3xc2 ↗