CVE-2025-7338: Multer vulnerable to Denial of Service via unhandled exception from malformed request

July 17, 2025

A vulnerability in Multer versions >= 1.4.4-lts.1, < 2.0.2 allows an attacker to trigger a Denial of Service (DoS) by sending a malformed request. This request causes an unhandled exception, leading to a crash of the process.

References

cna.openjsf.org/security-advisories.html
github.com/advisories/GHSA-fjgf-rc76-4x9p
github.com/expressjs/multer
github.com/expressjs/multer/commit/adfeaf669f0e7fe953eab191a762164a452d143b
github.com/expressjs/multer/security/advisories/GHSA-fjgf-rc76-4x9p
nvd.nist.gov/vuln/detail/CVE-2025-7338

Code Behaviors & Features

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