Bug 2367167 (CVE-2025-23167) - CVE-2025-23167 nodejs: Improper HTTP Header Termination in Node.js 20 Enables Request Smuggling
Summary: CVE-2025-23167 nodejs: Improper HTTP Header Termination in Node.js 20 Enables...
Keywords:
Status: NEW
Alias: CVE-2025-23167
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
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Depends On: 2367233 2367234
Blocks:
TreeView+ depends on / blocked
 
Reported: 2025-05-19 02:01 UTC by OSIDB Bzimport
Modified: 2025-05-19 15:46 UTC (History)
2 users (show)

Fixed In Version:
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Description OSIDB Bzimport 2025-05-19 02:01:18 UTC 
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.
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