HIGH

GHSA-g5hg-p3ph-g8qg

Multer vulnerable to Denial of Service via unhandled exception

Details

### Impact

A vulnerability in Multer versions >=1.4.4-lts.1, <2.0.1 allows an attacker to trigger a Denial of Service (DoS) by sending an upload file request with an empty string field name. This request causes an unhandled exception, leading to a crash of the process.

### Patches

Users should upgrade to `2.0.1`

### Workarounds

None

### References

https://github.com/expressjs/multer/commit/35a3272b611945155e046dd5cef11088587635e9 https://github.com/expressjs/multer/issues/1233 https://github.com/expressjs/multer/pull/1256

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: 2.0.1

Fix npm install multer@2.0.1

References

https://github.com/expressjs/multer/security/advisories/GHSA-g5hg-p3ph-g8qg [WEB]
https://nvd.nist.gov/vuln/detail/CVE-2025-48997 [ADVISORY]
https://github.com/expressjs/multer/issues/1233 [WEB]
https://github.com/expressjs/multer/pull/1256 [WEB]
https://github.com/expressjs/multer/commit/35a3272b611945155e046dd5cef11088587635e9 [WEB]
https://github.com/expressjs/multer [PACKAGE]