{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "versions": [
              {
                "introduced": "0"
              },
              {
                "fixed": "2.1.1"
              }
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "368c8a10cca11854cf17c24029fefd1eafb1c059"
            },
            {
              "fixed": "7e66481f8b2e6c54b982b34c152479e096ce2752"
            }
          ],
          "repo": "https://github.com/expressjs/multer",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-5528-5vmv-3xc2"
  ],
  "details": "Multer is a node.js middleware for handling `multipart/form-data`. A vulnerability in Multer prior to version 2.1.1 allows an attacker to trigger a Denial of Service (DoS) by sending malformed requests, potentially causing stack overflow. Users should upgrade to version 2.1.1 to receive a patch. No known workarounds are available.",
  "id": "CVE-2026-3520",
  "modified": "2026-03-15T21:49:43.353163948Z",
  "published": "2026-03-04T17:16:22.610Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://cna.openjsf.org/security-advisories.html"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/expressjs/multer/security/advisories/GHSA-5528-5vmv-3xc2"
    },
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-3520"
    },
    {
      "type": "FIX",
      "url": "https://github.com/expressjs/multer/commit/7e66481f8b2e6c54b982b34c152479e096ce2752"
    }
  ],
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}