Bug 2367167 (CVE-2025-23167)

Summary: CVE-2025-23167 nodejs: Improper HTTP Header Termination in Node.js 20 Enables Request Smuggling
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: caswilli, kaycoth
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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Doc Text:
A flaw was found in the HTTP parser of Node.js. This vulnerability allows attackers to perform request smuggling and bypass proxy-based access controls via improperly terminated HTTP/1 headers using \r\n\rX instead of the standard \r\n\r\n.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Bug Depends On: 2367233, 2367234    
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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.