GHSA-4pg4-qvpc-4q3h

Multer vulnerable to Denial of Service from maliciously crafted requests

Source: GitHub Advisory Database (reviewed) High CVE-2025-47944

Packages

Ecosystem	Package	Affected	Fixed in
npm	multer	>= 1.4.4-lts.1, < 2.0.0	2.0.0

Details

As written in the advisory (Markdown source, shown as plain text).

### 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

References

External links from the advisory. They lead to third-party sites.

https://github.com/expressjs/multer/security/advisories/GHSA-4pg4-qvpc-4q3h web
https://nvd.nist.gov/vuln/detail/CVE-2025-47944 advisory
https://github.com/expressjs/multer/issues/1176 web
https://github.com/expressjs/multer/commit/2c8505f207d923dd8de13a9f93a4563e59933665 web
https://github.com/expressjs/multer package