GHSA-753j-mpmx-qq6g: tornado (CVE-2024-14029)

Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling') in tornado

CVSS 9.0 CriticalCriticalEPSS 0.0036 · 30th percentile

Critical, because:

CVSS score 9.0: 9.0 or more.

Published by the GitHub Advisory Database at 6 Jun 2024, 21:41 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

Package	Ecosystem	Affected	Fixed in
tornado	PyPI	<6.4.1	6.4.1

Identifiers

GHSA-753j-mpmx-qq6g · CVE-2024-14029

Weakness (CWE)

CWE-444

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

Tornado versions before 6.4.1 ignore requests that contain two Transfer-Encoding: chunked headers, so they are treated as having no body. An attacker who can send requests through a proxy that forwards such headers can smuggle requests, which may allow ACL bypass, cache poisoning, or connection desynchronization. Upgrade tornado to version 6.4.1 or later.

Written 1 Nov 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

Score	Rating	CVSS	Vector	Source
9.0	Critical	4.0	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	CNA (VulnCheck)

CISA KEV Not listed.
EPSS 0.0036, the 30th percentile, on 6 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

31 Oct 2026, 14:10 UTC First seen by agentprime
31 Oct 2026, 14:10 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.