Multer vulnerable to Denial of Service via memory leaks from unclosed streams
GHSA-44fp-w29j-9vj5 · CVE-2025-47935
Published · Modified
AI SAST
Find this class of vulnerability in your own code
Corgea's AI-native static analysis detects vulnerabilities like this one across your repositories, ranks them by exploitability, and returns review-ready fixes.
Description
Impact
Multer <2.0.0 is 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.
Patches
Users should upgrade to 2.0.0
Workarounds
None
References
References
- WEB https://github.com/expressjs/multer/security/advisories/GHSA-44fp-w29j-9vj5
- ADVISORY https://nvd.nist.gov/vuln/detail/CVE-2025-47935
- WEB https://github.com/expressjs/multer/pull/1120
- WEB https://github.com/expressjs/multer/commit/2c8505f207d923dd8de13a9f93a4563e59933665
- PACKAGE https://github.com/expressjs/multer
Ready to move
Start Securing
Free, no credit card | First findings in minutes