HTTP request smuggling via bare-LF header termination
Published Jul 14, 2022 · Updated Apr 30, 2025
HTTP request smuggling in affected Node.js releases allows remote attackers to desynchronize HTTP request streams through malformed headers. The http module's llhttp parser treats a bare LF as a valid header-field terminator instead of requiring the protocol's CRLF sequence. Exploitation requires attacker-controlled HTTP/1.1 traffic to cross components that parse the same byte stream differently, enabling request routing or access-control bypass.
Summary
What happened
HTTP request smuggling in affected Node.js releases allows remote attackers to desynchronize HTTP request streams through malformed headers. The http module's llhttp parser treats a bare LF as a valid header-field terminator instead of requiring the protocol's CRLF sequence. Exploitation requires attacker-controlled HTTP/1.1 traffic to cross components that parse the same byte stream differently, enabling request routing or access-control bypass.
The record
- CVE
- CVE-2022-32214
- Published
- Jul 14, 2022
- Updated
- Apr 30, 2025
- Vendor
- Node.js
- Product
- Node.js
- Classifications
- CWE-444, CAPEC-33, T1190
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jul 14, 2022CVE publishedPublication date reported by the CVE source.
- Apr 30, 2025Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
Compare your product and version with the public record. A matching version still requires validation against your environment.
Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=10.0 <10.*
- Affected versionversion=11.0 <11.*
- Affected versionversion=12.0 <12.*
- Affected versionversion=13.0 <13.*
- Affected versionversion=14.0 <14.20.0
- Affected versionversion=15.0 <15.*
- Affected versionversion=16.0 <16.20.0
- Affected versionversion=17.0 <17.*
- Affected versionversion=18.0 <18.5.0
- Affected versionversion=4.0 <4.*
- Affected versionversion=5.0 <5.*
- Affected versionversion=6.0 <6.*
- Affected versionversion=7.0 <7.*
- Affected versionversion=8.0 <8.*
- Affected versionversion=9.0 <9.*
What conditions does exploitation require?
What is affected?
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
- HackerOne request-smuggling reportproof of concept · unverified
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
See the directory against your own environment.
Your stack
Check the software in your environment
Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.
Book a demo