Node.js CVE-2026-3520
HIGH
GHSA-5528-5vmv-3xc2
CVSS VectorNVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Lifecycle Timeline
3Blast Radius
ecosystem impact- 3,715 npm packages depend on multer (1,030 direct, 2,709 indirect)
Ecosystem-wide dependent count for version 2.1.1.
DescriptionNVD
Multer is a node.js middleware for handling multipart/form-data. A vulnerability in Multer prior to version 2.1.1 allows an attacker to trigger a Denial of Service (DoS) by sending malformed requests, potentially causing stack overflow. Users should upgrade to version 2.1.1 to receive a patch. No known workarounds are available.
AnalysisAI
Multer versions before 2.1.1 are susceptible to denial of service attacks when processing malformed multipart/form-data requests, which can trigger stack overflow conditions and crash Node.js applications. An unauthenticated remote attacker can exploit this vulnerability without user interaction to render affected services unavailable. …
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RemediationAI
Within 24 hours: Identify all applications using Multer and verify current version. Within 7 days: Apply patch to version 2.1.1 or later across all development, staging, and production environments. …
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External POC / Exploit Code
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