# CVE-2024-14029

## Summary

- **CVE ID:** CVE-2024-14029
- **Severity:** CRITICAL
- **CVSS Score:** 9 (CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:L/VI:H/VA:N/SC:L/SI:H/SA:N)
- **CWE:** CWE-444
- **Published:** Sep 15, 2026
- **Last Modified:** Sep 15, 2026

## 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.

## Affected Products

- tornadoweb — tornado (0)
- tornadoweb — tornado (6.4.1)

## References

- [CNA](https://github.com/tornadoweb/tornado/security/advisories/GHSA-753j-mpmx-qq6g)
- [CNA](https://www.vulncheck.com/advisories/tornado-before-6.4.1-http-request-smuggling-via-transfer-encoding)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.35%
- **EPSS Percentile:** 28.6

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-17._