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GHSA-qfvm-cv95-jqjf

multer vulnerable to Denial of Service via file descriptor leak on aborted uploads

Source: GitHub Advisory Database (reviewed) High CVE-2026-77037

Packages

EcosystemPackageAffectedFixed in
npm multer >= 2.2.0, < 2.3.0 2.3.0

Details

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

### 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.

References

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