CVE-2025-23167
Last modified
CVE-2025-23167 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. 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.. EPSS estimates a 0.47% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Weakness Enumeration
References
Timeline
- Published
- Last Modified
- Status
- Deferred
Frequently Asked Questions
What is CVE-2025-23167?
How severe is CVE-2025-23167?
How do I fix CVE-2025-23167?
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
Related CVEs from 2025
- CVE-2025-23161In the Linux kernel, the following vulnerability has been re…5.5
- CVE-2025-23162In the Linux kernel, the following vulnerability has been re…5.5
- CVE-2025-23163In the Linux kernel, the following vulnerability has been re…5.5
- CVE-2025-23164A misconfigured access token mechanism in the Unifi Protect …4.4
- CVE-2025-23165In Node.js, the `ReadFileUtf8` internal binding leaks memory…3.7
- CVE-2025-23166The C++ method SignTraits::DeriveBits() may incorrectly call…7.5
- CVE-2025-23168The Versa Director SD-WAN orchestration platform implements …8.8
- CVE-2025-23169The Versa Director SD-WAN orchestration platform allows cust…6.1
- CVE-2025-2317The Product Filter by WBW plugin for WordPress is vulnerable…7.5
- CVE-2025-23170The Versa Director SD-WAN orchestration platform includes fu…6.7
- CVE-2025-23171The Versa Director SD-WAN orchestration platform provides an…7.2
- CVE-2025-23172The Versa Director SD-WAN orchestration platform includes a …7.2
Are you affected by CVE-2025-23167?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST