multer is a middleware for handling multipart/form-data in Node.js. A small multipart request with two specially crafted text field names can make multer's field parser synchronously iterate a maximum-length sparse array, blocking the event loop so the process cannot handle other requests. A large numeric array index in the first field allocates a maximum-length sparse array, and a second field with a non-numeric key then triggers a full-length iteration inside the append-field dependency. All versions before 2.3.0 are affected, and this is a remotely triggerable denial of service. multer 2.3.0 adds an opt-in fieldArrayIndexLimit option that rejects oversized array indexes. Upgrade to multer 2.3.0 and set limits.fieldArrayIndexLimit to the largest array index your application needs to remediate.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - multer is a middleware for handling multipart/form-data in Node.js. A small multipart request with two     specially crafted text field names can make multer's field parser synchronously iterate a maximum-length     sparse array, blocking the event loop so the process cannot handle other requests. A large numeric array     index in the first field allocates a maximum-length sparse array, and a second field with a non-numeric     key then triggers a full-length iteration inside the append-field dependency. All versions before 2.3.0     are affected, and this is a remotely triggerable denial of service. multer 2.3.0 adds an opt-in     fieldArrayIndexLimit option that rejects oversized array indexes. Upgrade to multer 2.3.0 and set     limits.fieldArrayIndexLimit to the largest array index your application needs to remediate.
    (CVE-2026-82333)

Note that Nessus relies on the presence of the package as reported by the vendor.

There are packages installed that are affected by a vulnerability referenced in the following CVE:

  - multer is a middleware for handling multipart/form-data in Node.js. A small multipart request with two
    specially crafted text field names can make multer's field parser synchronously iterate a maximum-length
    sparse array, blocking the event loop so the process cannot handle other requests. A large numeric array
    index in the first field allocates a maximum-length sparse array, and a second field with a non-numeric
    key then triggers a full-length iteration inside the append-field dependency. All versions before 2.3.0
    are affected, and this is a remotely triggerable denial of service. multer 2.3.0 adds an opt-in
    fieldArrayIndexLimit option that rejects oversized array indexes. Upgrade to multer 2.3.0 and set
    limits.fieldArrayIndexLimit to the largest array index your application needs to remediate.
    (CVE-2026-82333)

ID	Name	Product	Family	Type	Severity
372179	Linux Distros Unpatched Vulnerability : CVE-2026-82333	Nessus	Misc.	Local	high
462904	Echo: multer: security update to 2.1.1+echo.1	Tenable Cloud Security	Echo Local Security Checks	Local	high
462904	Echo: multer: security update to 2.1.1+echo.1	Tenable Self-Hosted Container Security	Echo Local Security Checks	Local	high

Detections

Analytics

CVE-2026-82333

high

Tenable Plugins

high

high

high