Signal is active with 1 mentions in latest observed window
Recommended action window: Monitor and triage in normal cycle
NVD description
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.
Priority
LOW
Exploitation
NONE
PoC
NONE
Patch
AVAILABLE
Momentum
STABLE
If you run products in this scope, you should treat this CVE as relevant to your environment.
| Date | Total | Labels |
|---|
| 2026-08-28 | 1 | Patch1 |
| 2026-09-09 | 1 | Disclosure1 |
🚨 High-severity security fix in multer@2.3.0 just released! Patches CVE-2026-77078: multer vulnerable to denial of service via crafted multipart field names https://github.com/expressjs/multer/security/advisories/GHSA-wc9g-mqfw-jrwm
Post summary
The tweet announces a new patch for multer that addresses a DoS vulnerability (CVE‑2026‑77078) and directs readers to the advisory for details.
🔴 Multer (Nodejs middleware), Denial of Service via Crafted Multipart Field Names, #CVE-2026-77078 (High) -DC-Sep2026-2273 https://dailycve.com/multer-nodejs-middleware-denial-of-service-via-crafted-multipart-field-names-cve-2026-77078-high-dc-sep2026-2273/
Post summary
A new high‑severity DoS vulnerability was disclosed in Multer’s Node.js middleware, triggered by crafted multipart field names; no PoC, exploitation reports, patch, or false‑positive claims are mentioned.
1 of 1 entries
| Part | Vendor | Product | Version | Target SW | Target HW |
|---|---|---|---|---|---|
| App | expressjs | multer | - | node.js | - |