Multer vulnerable to Denial of Service via resource exhaustion
### Impact A vulnerability in Multer versions < 2.1.0 allows an attacker to trigger a Denial of Service (DoS) by dropping connection during file upload, potentially causing resource exhaustion. ### Patches Users should upgrade to `2.1.0` ### Workarounds None
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describes (1)
Related CVEs.
| ID | severity | exploitable | ||
|---|---|---|---|---|
| CVE-2026-2359US | high7.5 | — | ||
Multer is a node.js middleware for handling `multipart/form-data`. A vulnerability in Multer prior to version 2.1.0 allows an attacker to trigger a Denial of Service (DoS) by dropp… | ||||
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references
External citations — patches, advisories, analysis.
- https://cna.openjsf.org/security-advisories.htmlWEB
- https://github.com/expressjs/multerPACKAGE
- https://github.com/expressjs/multer/commit/cccf0fe0e64150c4f42ccf6654165c0d66b9adabWEB
- https://github.com/expressjs/multer/security/advisories/GHSA-v52c-386h-88mcWEB
- https://nvd.nist.gov/vuln/detail/CVE-2026-2359ADVISORY
- https://www.cve.org/CVERecord?id=CVE-2026-2359WEB
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