{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "2.2.0"
              },
              {
                "fixed": "2.3.0"
              }
            ],
            "source": "DESCRIPTION"
          },
          "events": [
            {
              "introduced": "2e2af08157c66cbbc76539ccbd8869097a0c8feb"
            },
            {
              "fixed": "4e8edf50dbb5ddec213b6253642cbc08ce0225a7"
            }
          ],
          "repo": "https://github.com/expressjs/multer",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-3pph-fpjx-jg34"
  ],
  "database_specific": {
    "cna_assigner": "openjs",
    "cwe_ids": [
      "CWE-400",
      "CWE-459"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/88xxx/CVE-2026-88932.json",
    "unresolved_ranges": [
      {
        "extracted_events": [
          {
            "introduced": "2.2.0"
          },
          {
            "fixed": "2.4.0"
          }
        ],
        "source": "AFFECTED_FIELD"
      }
    ]
  },
  "details": "multer is a Node.js middleware for handling multipart/form-data uploads. In versions 2.2.0 through 2.3.0, when a request using disk storage is aborted mid-upload, file writes that complete after multer has already run its abort cleanup are not removed, so each aborted upload can leave an orphaned file on disk. A remote unauthenticated attacker can repeatedly start and abort uploads to accumulate orphaned files and exhaust disk space, causing a denial of service. The issue is fixed in multer 2.4.0, and users should upgrade to 2.4.0 or later.",
  "id": "CVE-2026-88932",
  "modified": "2026-09-16T03:30:31.083231156Z",
  "published": "2026-09-14T08:46:12.896Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://cna.openjsf.org/security-advisories.html"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/88xxx/CVE-2026-88932.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/expressjs/multer/security/advisories/GHSA-3pph-fpjx-jg34"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-88932"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
      "type": "CVSS_V3"
    }
  ],
  "summary": "multer vulnerable to Denial of Service via orphaned disk writes on aborted uploads"
}