CVE-2024-14029

Publication date 15 September 2026

Last updated 22 October 2026

Ubuntu priority

Cvss 3 Severity Score

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.

Status

Show unmaintained releases

Package	Ubuntu Release	Status
python-tornado	26.10 stonking	Not affected
	26.04 LTS resolute	Not affected
	24.04 LTS noble	Fixed in 6.4.0-1ubuntu0.6
	22.04 LTS jammy	Fixed in 6.1.0-3ubuntu0.1~esm6
	20.04 LTS focal	Fixed in 6.0.3+really5.1.1-3ubuntu0.1~esm6
	18.04 LTS bionic	Fixed in 4.5.3-1ubuntu0.2+esm4
	16.04 LTS xenial	Fixed in 4.2.1-1ubuntu3.1+esm4

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Severity score breakdown

CVSS version:

Base score 9.0 · Critical

Base metrics

Parameter	Value
Attack vector	Network
Attack complexity	High
Attack requirements	Present
Privileges required	None
User interaction	None
Vulnerable system - Confidentiality impact	Low
Vulnerable system - Integrity impact	High
Vulnerable system - Availability impact	None
Subsequent system - Confidentiality impact	Low
Subsequent system - Integrity impact	High
Subsequent system - Availability impact	None

Scores

Parameter	Value
Base score	9.0 · Critical
Base + Threat score	-
Base + Environmental score	-
Base + Threat + Environmental score	-

Vector: 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

Base score 7.5 · High