GHSA-qfvm-cv95-jqjf
multer vulnerable to Denial of Service via file descriptor leak on aborted uploads
At a glance
- Published
- Updated
- CVE
- CVE-2026-77037
- CVSS_V3
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Description
### Impact A vulnerability in multer `2.2.0` allows an attacker to trigger a Denial of Service (DoS) by aborting or truncating multipart uploads. When using `diskStorage`, the destination write stream is not closed if the upload is aborted before it finishes, so each failed request leaks an open file descriptor and retains its disk blocks until the process exits. Repeated failed uploads can exhaust the available file descriptors. All applications using multer's disk storage are affected. ### Patches Users should upgrade to `2.3.0`. ### Workarounds None.
Affected packages
| Package | Versions |
|---|---|
| npm · multer | introduced 2.2.0, fixed 2.3.0 |
References
- https://github.com/expressjs/multer/security/advisories/GHSA-qfvm-cv95-jqjf WEB
- https://nvd.nist.gov/vuln/detail/CVE-2026-77037 ADVISORY
- https://github.com/expressjs/multer/commit/eef74440b491ef0f976f3d25895e8089ae495df0 WEB
- https://cna.openjsf.org/security-advisories.html WEB
- https://github.com/expressjs/multer PACKAGE
- https://github.com/expressjs/multer/releases/tag/v2.3.0 WEB
Sources
| Source | Licence |
|---|---|
| OSV.dev | CC-BY 4.0 — GitHub Advisory Database |