High severity · published Sep 15, 2026
CVE-2024-14029
Tornado before 6.4.1 HTTP Request Smuggling via Transfer-Encoding
7.5
CVSS
0.4%
EPSS
No
On KEV
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 vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:H/A:N
Attack vector
Network
Complexity
High
Privileges
None
User interaction
None
Confidentiality
Low
Integrity
High
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 30% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
TO
tornado · tornadoweb
before 6.4.1 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2024-14029
CVE.org
https://www.cve.org/CVERecord?id=CVE-2024-14029
github.com
https://github.com/tornadoweb/tornado/security/advisories/GHSA-753j-mpmx-qq6g
www.vulncheck.com
https://www.vulncheck.com/advisories/tornado-before-6.4.1-http-request-smuggling-via-transfer-encoding
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