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    "cveMetadata": {
        "cveId": "CVE-2026-77063",
        "assignerOrgId": "ce714d77-add3-4f53-aff5-83d477b104bb",
        "state": "PUBLISHED",
        "assignerShortName": "openjs",
        "dateReserved": "2026-08-20T09:59:20.298Z",
        "datePublished": "2026-08-28T19:54:58.473Z",
        "dateUpdated": "2026-08-28T19:54:58.473Z"
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                "orgId": "ce714d77-add3-4f53-aff5-83d477b104bb",
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            "descriptions": [
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                    "lang": "en",
                    "value": "multer is a middleware for handling multipart/form-data in Node.js. When an application uses an asynchronous fileFilter together with the fileSize limit, a race condition in multer's file stream handling can allow a file that exceeds the configured size limit to bypass the size-limit rejection. All versions before 2.3.0 are affected. The impact is limited because the underlying multipart parser still truncates the stream at the size limit, so this is a bypass of the limit rejection rather than uncontrolled resource consumption. The issue is fixed in multer 2.3.0. Upgrade to multer 2.3.0 to remediate.",
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                            "value": "multer is a middleware for handling multipart/form-data in Node.js. When an application uses an asynchronous fileFilter together with the fileSize limit, a race condition in multer's file stream handling can allow a file that exceeds the configured size limit to bypass the size-limit rejection. All versions before 2.3.0 are affected. The impact is limited because the underlying multipart parser still truncates the stream at the size limit, so this is a bypass of the limit rejection rather than uncontrolled resource consumption. 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-qvfw-j98x-7q72"
                },
                {
                    "url": "https://cna.openjsf.org/security-advisories.html"
                }
            ],
            "credits": [
                {
                    "lang": "en",
                    "type": "reporter",
                    "value": "ThinkerHao"
                },
                {
                    "lang": "en",
                    "type": "remediation developer",
                    "value": "bjohansebas"
                },
                {
                    "lang": "en",
                    "type": "remediation reviewer",
                    "value": "UlisesGascon"
                }
            ],
            "title": "multer vulnerable to file size limit bypass via async fileFilter race condition",
            "metrics": [
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                    "format": "CVSS",
                    "cvssV3_1": {
                        "version": "3.1",
                        "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N",
                        "baseScore": 3.7,
                        "baseSeverity": "LOW"
                    },
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                            "lang": "en",
                            "value": "GENERAL"
                        }
                    ]
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            ],
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-362",
                            "lang": "en",
                            "description": "CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')",
                            "type": "CWE"
                        }
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