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CVE-2026-77063 multer vulnerable to file size limit bypass via async fileFilter race condition

🗓️ 28 Aug 2026 19:54:58Reported by openjsType 
cvelist
 cvelist
🔗 www.cve.org👁 5 Views

Race condition in multer before 2.3.0 allows async fileFilter to bypass file size limit rejection.

Related
Affected
Refs
ReporterTitlePublishedViews
Family
circl
Circl
CVE-2026-77063
28 Aug 202619:58
circl
cve
CVE
CVE-2026-77063
28 Aug 202619:54
cve
euvd
EUVD
EUVD-2026-67929
28 Aug 202619:54
euvd
nvd
NVD
CVE-2026-77063
28 Aug 202622:16
nvd
ptsecurity
Positive Technologies
PT-2026-83357
28 Aug 202600:00
ptsecurity
[
  {
    "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"
  }
]

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