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Uncontrolled Recursion in multer

CVE-2026-3520

  • multer
  • org.webjars.npm:multer
High
8.7/10

Summary

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.

  • LOW
  • NETWORK
  • NONE
  • UNCHANGED
  • NONE
  • NONE
  • NONE
  • HIGH

CWE-674 - Uncontrolled Recursion

The product does not properly control the amount of recursion which takes place, consuming excessive resources, such as allocated memory or the program stack.

References

Advisory Timeline

  • Published