Multer is a node.js middleware for handling multipart/form-data.
CVE-2025-47944
Impact A vulnerability in Multer versions >=1.4.4-lts.1 allows an attacker to trigger a Denial of Service (DoS) by sending a malformed multi-part upload request. This request causes an unhandled exception, leading to a crash of the process. Patches Users should upgrade to 2.0.0 Workarounds None References https://github.com/expressjs/multer/issues/1176 https://github.com/expressjs/multer/commit/2c8505f207d923dd8de13a9f93a4563e59933665
Assessment
- CVSS
- 7.5 (v3.1)
- Severity
- High
- EPSS
- 0.81% 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
- 19 May 2025
- Last updated
- 17 June 2026
- Weakness
- CWE-248
- Assigner
- security-advisories@github.com
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
At the source
References
- https://github.com/expressjs/multer/commit/2c8505f207d923dd8de13a9f93a4563e59933665
- https://github.com/expressjs/multer/issues/1176
- https://github.com/expressjs/multer/security/advisories/GHSA-4pg4-qvpc-4q3h
- https://nvd.nist.gov/vuln/detail/CVE-2025-47944
- https://github.com/advisories/GHSA-4pg4-qvpc-4q3h
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