CVE-2024-14029
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.
- Published Sep 15, 2026
- CVSS 9.0 critical
- 0.4% chance of exploitation in the next 30 days (EPSS)
- A fix is available