CVE-2026-77078High· 7.5▾ Twilightmulter vulnerable to Denial of Service via crafted multipart field names
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 41.3 · likelihood 0.1 · exploitation 0
Need a working PoC? Pro members can cast a request and our team develops one — it lands right here.
Exploit-prediction probability, daily snapshots since Sep 8.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via GHSA
0.3%
A vulnerability in multer allows a remote, unauthenticated attacker to crash the Node.js process with a single multipart/form-data request. Two specially crafted text field names cause an uncaught RangeError: Invalid array length inside multer's field parsing, which is not routed to the application error handler and terminates the process. All applications using multer to parse multipart requests are affected.
Users should upgrade to 2.3.0.
None.
multer < 2.3.0Upgrade to a patched release:
multer 2.3.0Connected by shared product, vendor, weakness, or advisory.
CVE-2026-77037High· 7.5multer vulnerable to Denial of Service via file descriptor leak on aborted uploads
CVE-2026-77063Low· 3.7multer vulnerable to file size limit bypass via async fileFilter race condition
CVE-2026-82333High· 7.5multer vulnerable to Denial of Service via oversized array index in field names
CVE-2026-13697High· 7.4undici vulnerable to cross-user information disclosure and parse-time crash via degenerate private cache directives
CVE-2026-92081Medium· 5.9fastify is a fast and low-overhead web framework for Node.js
CVE-2026-87123Medium· 5.9hbs is an Express view engine wrapper for Handlebars