High severityNVD Advisory· Published Feb 27, 2026· Updated Feb 27, 2026
Multer vulnerable to Denial of Service via resource exhaustion
CVE-2026-2359
Description
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 dropping connection during file upload, potentially causing resource exhaustion. Users should upgrade to version 2.1.0 to receive a patch. No known workarounds are available.
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Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
multernpm | < 2.1.0 | 2.1.0 |
Affected products
4- osv-coords3 versions
< 0.8.2-r7+ 2 more
- (no CPE)range: < 0.8.2-r7
- (no CPE)range: < 3.2.0-r1
- (no CPE)range: < 2.1.0
Patches
Vulnerability mechanics
References
6- github.com/advisories/GHSA-v52c-386h-88mcghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2026-2359ghsaADVISORY
- cna.openjsf.org/security-advisories.htmlghsaWEB
- github.com/expressjs/multer/commit/cccf0fe0e64150c4f42ccf6654165c0d66b9adabghsaWEB
- github.com/expressjs/multer/security/advisories/GHSA-v52c-386h-88mcghsaWEB
- www.cve.org/CVERecordghsaWEB
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