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              "versionType": "semver"
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              "version": "3.0.0-alpha.1",
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              "version": "3.0.0-alpha.2",
              "versionType": "semver"
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          "type": "reporter",
          "value": "tndud042713"
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          "type": "remediation developer",
          "value": "UlisesGascon"
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              "value": "Impact: multer versions 1.0.0 through 2.1.1 and 3.0.0-alpha.1 are vulnerable to a Denial of Service via deeply nested field names in multipart form data. The append-field dependency parses bracket notation in field names with no limit on nesting depth, allowing an attacker to force allocation of deeply nested object structures that consume CPU and memory. A single HTTP request with a crafted multipart body is sufficient to exploit this.\n\nPatches: Users should upgrade to multer 2.2.0 (2.x line) or 3.0.0-alpha.2 (3.x prerelease) and configure the new limits.fieldNestingDepth option to the minimum depth their application requires.\n\nWorkarounds: Set limits.fields to a reasonable value to reduce the number of fields an attacker can send per request. This does not fully mitigate the issue but limits the impact."
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          "cvssV3_1": {
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
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            {
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              "description": "CWE-400: Uncontrolled Resource Consumption",
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        "dateUpdated": "2026-06-15T13:56:45.520Z",
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        "shortName": "openjs"
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        {
          "url": "https://github.com/expressjs/multer/security/advisories/GHSA-72gw-mp4g-v24j"
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      "title": "multer vulnerable to Denial of Service via deeply nested field names",
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    "cveId": "CVE-2026-5079",
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    "dateReserved": "2026-03-28T19:04:56.443Z",
    "dateUpdated": "2026-06-15T16:00:43.955Z",
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