CVE-2025-23167 log

Source	CVE Red Hat MITRE NVD Debian Ubuntu SUSE Alpine Mageia CVE Details CIRCL Bugs Arch Linux Red Hat Gentoo SUSE GitHub Lists oss-security full-disclosure bugtraq Misc GitHub code web search
Severity	Medium
Remote	Yes
Type	Access restriction bypass
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.

Group	Package	Affected	Fixed	Severity	Status	Ticket
AVG-2873	nodejs-lts-iron	20.19.1-1	20.19.2-1	High	Fixed

Date	Advisory	Group	Package	Severity	Type
18 May 2025	ASA-202505-8	AVG-2873	nodejs-lts-iron	High	multiple issues

References
https://nodejs.org/en/blog/vulnerability/may-2025-security-releases#improper-http-header-block-termination-in-llhttp-cve-2025-23167---medium

Notes
This vulnerability affects only Node.js 20.x users prior to the llhttp v9 upgrade.