Is there a public exploit for CVE-2026-82333?

No public exploit for CVE-2026-82333 was found in Exploit-DB, Metasploit, Nuclei templates or public proof-of-concept repositories. That is an absence of evidence rather than proof that none exists.

How severe is CVE-2026-82333?

CVE-2026-82333 scores CVSS 7.5 (v3.1), rated high. EPSS puts the chance of exploitation in the next 30 days at 0.37%.

What does CVE-2026-82333 affect?

CVE-2026-82333 affects multer multer.

7.5 High

multer is a middleware for handling multipart/form-data in Node.js.

CVE-2026-82333

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.

Assessment

CVSS: 7.5 (v3.1)
Severity: High
EPSS: 0.37% chance of exploitation in the next 30 days
Known exploited: Not listed in CISA KEV
Exploit availability: Nothing found in Exploit-DB, Metasploit, Nuclei or public PoC repositories
Published: 28 August 2026
Last updated: 2 September 2026
Affected: multer · multer
Weakness: CWE-400
Assigner: ce714d77-add3-4f53-aff5-83d477b104bb

CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

At the source

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