CVE-2026-77078
- Source
- https://cve.org/CVERecord?id=CVE-2026-77078
- Import Source
- https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-77078.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/CVE-2026-77078
- Aliases
- Downstream
- Published
- 2026-08-28T20:03:23Z
- Modified
- 2026-09-04T03:47:32Z
- Severity
-
- 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
- Summary
- multer vulnerable to Denial of Service via crafted multipart field names
- Details
-
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.
- Database specific
{ "cna_assigner": "openjs", "cwe_ids": [ "CWE-248" ], "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/77xxx/CVE-2026-77078.json" }- References
Affected packages
Git / github.com/expressjs/multer
Affected ranges
- Type
- GIT
- Repo
- https://github.com/expressjs/multer
- Events
-
Introduced0 Unknown introduced commit / All previous commits are affectedFixed
- Database specific
-
Show details
{ "cpe": "cpe:2.3:a:expressjs:multer:*:*:*:*:*:node.js:*:*", "extracted_events": [ { "introduced": "0" }, { "fixed": "2.3.0" } ], "source": [ "AFFECTED_FIELD", "CPE_RANGE" ] }