CVE-2024-14029: Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling') in tornadoweb tornado
Tornado before 6.4.1 ignores duplicate Transfer-Encoding: chunked headers, treating requests as having no message body and parsing the chunked body as a subsequent request. Attackers can exploit this inconsistency when Tornado is deployed behind proxies to perform HTTP request smuggling, enabling access control bypass, cache poisoning, or connection desynchronization.
AI Analysis
Technical Summary
Tornado versions prior to 6.4.1 improperly handle HTTP requests containing duplicate Transfer-Encoding: chunked headers by ignoring the duplicates and treating the request as having no message body. This causes the chunked body to be parsed as a subsequent request, creating an inconsistency exploitable in HTTP request smuggling attacks. Such attacks can be leveraged to bypass access controls, poison caches, or desynchronize connections when Tornado is deployed behind proxy servers.
Potential Impact
Successful exploitation can allow attackers to bypass access controls, poison caches, or cause connection desynchronization, which may lead to unauthorized access or manipulation of HTTP traffic. The vulnerability has a critical severity with a CVSS 4.0 score of 9, indicating a high potential impact on confidentiality, integrity, and availability.
Mitigation Recommendations
Upgrade Tornado to version 6.4.1 or later, where this vulnerability is fixed. No other mitigation or temporary workaround is indicated. Patch status is confirmed fixed in Tornado 6.4.1.
CVE-2024-14029: Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling') in tornadoweb tornado
Description
Tornado before 6.4.1 ignores duplicate Transfer-Encoding: chunked headers, treating requests as having no message body and parsing the chunked body as a subsequent request. Attackers can exploit this inconsistency when Tornado is deployed behind proxies to perform HTTP request smuggling, enabling access control bypass, cache poisoning, or connection desynchronization.
CVSS v4.0
Score 9.0critical
Affected software
tornadoweb
tornado
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AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
Tornado versions prior to 6.4.1 improperly handle HTTP requests containing duplicate Transfer-Encoding: chunked headers by ignoring the duplicates and treating the request as having no message body. This causes the chunked body to be parsed as a subsequent request, creating an inconsistency exploitable in HTTP request smuggling attacks. Such attacks can be leveraged to bypass access controls, poison caches, or desynchronize connections when Tornado is deployed behind proxy servers.
Potential Impact
Successful exploitation can allow attackers to bypass access controls, poison caches, or cause connection desynchronization, which may lead to unauthorized access or manipulation of HTTP traffic. The vulnerability has a critical severity with a CVSS 4.0 score of 9, indicating a high potential impact on confidentiality, integrity, and availability.
Mitigation Recommendations
Upgrade Tornado to version 6.4.1 or later, where this vulnerability is fixed. No other mitigation or temporary workaround is indicated. Patch status is confirmed fixed in Tornado 6.4.1.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulnCheck
- Date Reserved
- 2026-03-23T19:30:06.622Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6aa9651455bf5e2cf502e8eb
Added to database: 09/15/2026, 15:32:36 UTC
Last enriched: 09/15/2026, 16:16:42 UTC
Last updated: 09/15/2026, 23:58:41 UTC
Views: 7
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