Cloud Vulnerability DB
An open project to list all known cloud vulnerabilities and Cloud Service Provider security issues
Vulnerability DatabaseCVE-2025-23167
CVE-2025-23167:
Linux Debian vulnerability analysis and mitigation
Overview
A medium severity vulnerability (CVE-2025-23167) was discovered in Node.js 20's HTTP parser (llhttp). The vulnerability was disclosed on May 14, 2025, affecting Node.js 20.x versions prior to the llhttp v9 upgrade (Node.js Blog).
Technical details
The vulnerability stems from improper HTTP header block termination in llhttp, where the parser accepts improper termination of HTTP/1 headers using \r\n\rX instead of the required \r\n\r\n sequence. This inconsistency in header termination handling creates a security weakness in the HTTP parsing mechanism (Node.js Blog, Security Online).
Impact
The vulnerability enables request smuggling attacks, which can allow attackers to bypass proxy-based access controls and submit unauthorized requests. This could potentially lead to unauthorized access to protected resources and exposure of sensitive information (Node.js Blog).
Mitigation and workarounds
The issue has been resolved by upgrading llhttp to version 9, which enforces correct header termination. Users are advised to update to Node.js v20.19.2 or later versions that include this fix (Node.js Blog, Node.js Release).
Additional resources
Source: This report was generated using AI
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