AUGUST 4, 2026
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Case File

CVE-2025-23167

MEDIUM · CVSS 6.5 EPSS 0.47%

Source: NVD + CISA KEV + EPSS (historical backfill) · Published 2025-05-19 · Last synced 2026-08-04

CyberRota Analysis

This is a medium severity vulnerability with a CVSS score of 6.5. See the original NVD description below for full technical details.

CVE
CVE-2025-23167
Severity
MEDIUM
CVSS
6.5
EPSS
0.47%

Original NVD Description

A flaw in Node.js 20's HTTP parser allows improper termination of HTTP/1 headers using `\r\n\rX` instead of the required `\r\n\r\n`. This inconsistency enables request smuggling, allowing attackers to bypass proxy-based access controls and submit unauthorized requests. The issue was resolved by upgrading `llhttp` to version 9, which enforces correct header termination. Impact: * This vulnerability affects only Node.js 20.x users prior to the `llhttp` v9 upgrade.