A vulnerability in Multer versions >=1.4.4-lts.1, <2.0.1 allows an attacker to trigger a Denial of Service (DoS) by sending an upload file request with an empty string field name. This request causes an unhandled exception, leading to a crash of the process.
Users should upgrade to 2.0.1
None
https://github.com/expressjs/multer/commit/35a3272b611945155e046dd5cef11088587635e9 https://github.com/expressjs/multer/issues/1233 https://github.com/expressjs/multer/pull/1256
{
"cwe_ids": [
"CWE-248"
],
"github_reviewed": true,
"github_reviewed_at": "2025-06-05T01:09:35Z",
"nvd_published_at": "2025-06-03T19:15:39Z",
"severity": "HIGH"
}