{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-77078",
        "assignerOrgId": "ce714d77-add3-4f53-aff5-83d477b104bb",
        "state": "PUBLISHED",
        "assignerShortName": "openjs",
        "dateReserved": "2026-08-20T10:53:48.073Z",
        "datePublished": "2026-08-28T20:03:23.114Z",
        "dateUpdated": "2026-08-28T20:03:23.114Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "ce714d77-add3-4f53-aff5-83d477b104bb",
                "shortName": "openjs",
                "dateUpdated": "2026-08-28T20:03:23.114Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "multer is a middleware for handling multipart/form-data in Node.js. A small multipart request containing two specially crafted text field names can cause an uncaught RangeError (Invalid array length) that terminates the Node.js process. The first field uses a very large numeric array index to allocate a maximum-length sparse array, and a second field then pushes past that length, which throws inside the append-field dependency and is not caught by multer. All versions before 2.3.0 are affected, and the issue is a remotely triggerable denial of service. The issue is fixed in multer 2.3.0. Upgrade to multer 2.3.0 to remediate.",
                    "supportingMedia": [
                        {
                            "type": "text/html",
                            "base64": false,
                            "value": "multer is a middleware for handling multipart/form-data in Node.js. A small multipart request containing two specially crafted text field names can cause an uncaught RangeError (Invalid array length) that terminates the Node.js process. The first field uses a very large numeric array index to allocate a maximum-length sparse array, and a second field then pushes past that length, which throws inside the append-field dependency and is not caught by multer. All versions before 2.3.0 are affected, and the issue is a remotely triggerable denial of service. The issue is fixed in multer 2.3.0. Upgrade to multer 2.3.0 to remediate."
                        }
                    ]
                }
            ],
            "affected": [
                {
                    "vendor": "multer",
                    "product": "multer",
                    "defaultStatus": "unaffected",
                    "versions": [
                        {
                            "versionType": "semver",
                            "status": "affected",
                            "version": "0",
                            "lessThan": "2.3.0"
                        },
                        {
                            "versionType": "semver",
                            "status": "unaffected",
                            "version": "2.3.0"
                        }
                    ],
                    "packageURL": "pkg:npm/multer"
                }
            ],
            "references": [
                {
                    "url": "https://github.com/expressjs/multer/security/advisories/GHSA-wc9g-mqfw-jrwm"
                },
                {
                    "url": "https://cna.openjsf.org/security-advisories.html"
                }
            ],
            "credits": [
                {
                    "lang": "en",
                    "type": "reporter",
                    "value": "O4FDev"
                },
                {
                    "lang": "en",
                    "type": "remediation developer",
                    "value": "UlisesGascon"
                }
            ],
            "title": "multer vulnerable to Denial of Service via crafted multipart field names",
            "metrics": [
                {
                    "format": "CVSS",
                    "cvssV3_1": {
                        "version": "3.1",
                        "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                        "baseScore": 7.5,
                        "baseSeverity": "HIGH"
                    },
                    "scenarios": [
                        {
                            "lang": "en",
                            "value": "GENERAL"
                        }
                    ]
                }
            ],
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-248",
                            "lang": "en",
                            "description": "CWE-248: Uncaught Exception",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "x_generator": {
                "engine": "cve-kit 1.0.0"
            }
        }
    }
}