{"cve":"CVE-2025-47935","nvd":{"published":"2025-05-19T20:15:25.863","modified":"2026-06-17T09:28:51.707","status":"Deferred","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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":7.5},"cwes":["CWE-401"],"references":["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"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:01:57.636215869+00:00"},"epss":{"cve":"CVE-2025-47935","score":0.00795,"percentile":0.56422,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-44fp-w29j-9vj5","url":"https://osv.dev/vulnerability/GHSA-44fp-w29j-9vj5","summary":"Multer vulnerable to Denial of Service via memory leaks from unclosed streams","modified":"2026-09-10T03:50:24.274645853Z","packages":[{"ecosystem":"npm","name":"multer","purl":"pkg:npm/multer","ranges":["<2.0.0"],"fixed":["2.0.0"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}