HIGH 7.5

GHSA-4pg4-qvpc-4q3h

Multer vulnerable to Denial of Service from maliciously crafted requests

Details

### 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

Are you affected?

Enter the version of the package you're using.

Affected packages

npm / multer

Introduced in: 1.4.4-lts.1 Fixed in: 2.0.0

Fix npm install multer@2.0.0

References

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]