CVE-2025-47935 Information

Description

Multer is a node.js middleware for handling multipart/form-data. 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 requiring manual server restarts to recover. All users of Multer handling file uploads are potentially impacted. Users should upgrade to 2.0.0 to receive a patch. No known workarounds are available.

Reference

https://github.com/expressjs/multer/commit/2c8505f207d923dd8de13a9f93a4563e59933665 https://github.com/expressjs/multer/pull/1120 https://github.com/expressjs/multer/security/advisories/GHSA-44fp-w29j-9vj5