What is CVE-2025-23167?

CVE-2025-23167 is a medium-severity vulnerability in Nodejs Node. CVSS score: 6.5/10. Published 2025-05-19.

How severe is CVE-2025-23167?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Is CVE-2025-23167 known to be exploited?

6 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Vulnerability in Nodejs Node

CVE-2025-23167

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…

EPSS: 0.001 (26.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N.

Affected products

Nodejs Node — versions 4.0, 5.0, 6.0

Public proof-of-concept exploits

References

nodejs.org/en/blog/vulnerability/may-2025-security-releases

Frequently asked questions

What is CVE-2025-23167?: CVE-2025-23167 is a medium-severity vulnerability in Nodejs Node. CVSS score: 6.5/10. Published 2025-05-19.
How severe is CVE-2025-23167?: Medium severity. CVSS v3 base score is 6.5 out of 10.
Is CVE-2025-23167 known to be exploited?: 6 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.