CVEvulnerability

CVE-2025-23167

6.5 MEDIUM Published 2025-05-19 Modified 2026-06-17 Official page ↗
Status
Deferred
Published
2025-05-19
Last modified
2026-06-17
Assigner
[email protected]
CVSS 3.0 ([email protected])
6.5 MEDIUM — CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Weaknesses
CWE-444

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.

Related

Weakness · CWE (1)

  • CWE-444 Inconsistent Interpretation of HTTP Requests weakness

References