# CVE-2025-48997

## Summary

- **CVE ID:** CVE-2025-48997
- **Severity:** HIGH
- **CVSS Score:** 8.7 (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)
- **CWE:** CWE-248
- **Published:** Jun 3, 2025
- **Last Modified:** Mar 13, 2026

## Description

Multer is a node.js middleware for handling `multipart/form-data`. A vulnerability that is present starting in version 1.4.4-lts.1 and prior to version 2.0.1 allows an attacker to trigger a Denial of Service (DoS) by sending an upload file request with an empty string field name. This request causes an unhandled exception, leading to a crash of the process. Users should upgrade to `2.0.1` to receive a patch. No known workarounds are available.

## Affected Products

- expressjs — multer (>= 1.4.4-lts.1, < 2.0.1)

## References

- [CNA](https://github.com/expressjs/multer/security/advisories/GHSA-g5hg-p3ph-g8qg)
- [CNA](https://github.com/expressjs/multer/issues/1233)
- [CNA](https://github.com/expressjs/multer/pull/1256)
- [CNA](https://github.com/expressjs/multer/commit/35a3272b611945155e046dd5cef11088587635e9)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.44%
- **EPSS Percentile:** 36.8

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-10._