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Missing Release of Memory after Effective Lifetime in multer

CVE-2025-47935

  • multer
  • org.webjars.npm:multer
High
7.5/10

Summary

Multer is a Node.js middleware for handling "multipart/form-data". In versions prior to 2.0.0 are vulnerable to a resource exhaustion and memory leak issue due to improper stream handling. When the HTTP request stream emits an error, the internal "busboy" stream is not closed, violating Node.js stream safety guidance. This leads to unclosed streams accumulating over time, consuming memory and file descriptors. Under sustained or repeated failure conditions, this can result in Denial of Service (DoS), requiring manual server restarts to recover. All users of Multer handling file uploads are potentially impacted. This has the same fix as CVE-2025-47944.

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

CWE-401 - Missing release of memory after effective lifetime (memory leak)

'Missing release of memory after effective lifetime (memory leak)' is a weakness that occurs when software doesn't effectively release allocated memory after it is used. If not addressed, this enables attackers to launch denial of service attacks (by crashing or hanging the program) or take advantage of other unexpected behavior resulting from low memory conditions.

References

Advisory Timeline

  • Published