Security Advisory

CVE-2025-23167

CVE vulnerability detail — eXtreme Datacenter Security Operations

Published 2025-05-19 01:25:08

Last updated 2025-05-27 18:31:36

Assigner hackerone

State PUBLISHED

Description

A flaw in Node.js 20s HTTP parser allows improper termination of HTTP/1 headers using `rnrX` instead of the required `rnrn`. 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.

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