How serious is CVE-2026-3304?

This vulnerability has a CVSS score of 8.7 out of 10, classified as HIGH severity. Proof-of-concept exploit code is publicly available, making this an active threat.

Is there exploit code available for CVE-2026-3304?

Yes, proof-of-concept exploit code for CVE-2026-3304 is publicly available on GitHub and security research platforms. This increases the risk of active exploitation.

Which products are affected by CVE-2026-3304?

Check the official CVE details for a complete list of affected products and versions.

How do I fix CVE-2026-3304?

To remediate CVE-2026-3304, check for security patches from the vendor. Apply all available updates and security patches. If no patch is available, implement recommended workarounds or security controls to mitigate the risk.

CVE-2026-3304

High

|8.7

Exploit Available

Plain English Summary

AI-powered analysis for quick understanding

An attacker can exploit a flaw in Multer to overwhelm the server by sending poorly formatted requests, leading to a Denial of Service (DoS) that makes the application unavailable. This issue affects versions before 2.1.0, so it's crucial to upgrade to the latest version to prevent this problem.

Technical Description

Multer is a node.js middleware for handling `multipart/form-data`. A vulnerability in Multer prior to version 2.1.0 allows an attacker to trigger a Denial of Service (DoS) by sending malformed requests, potentially causing resource exhaustion. Users should upgrade to version 2.1.0 to receive a patch. No known workarounds are available.

CVSS Vector Analysis

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

Confidentiality ImpactHigh

Integrity ImpactHigh

Availability ImpactHigh

ScopeChanged

Vector String

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Exploit Resources

Search for proof-of-concept code and exploit modules

GitHub Search Exploit-DB Nuclei Templates Metasploit Vulners

Official References

NIST NVD

Est. Bounty

$4,579($1K-$5K)

Vendor Response

Grade APatched in 3 days

Quick Information

Published

Feb 27, 2026

about 1 month ago

Last Modified

Mar 2, 2026

about 1 month ago