CVE-2024-14029 Tornado - HTTP Request Smuggling

Tornado < 6.4.1 contains an HTTP request smuggling vulnerability caused by ignoring duplicate Transfer-Encoding: chunked headers, letting attackers perform request smuggling to bypass access control, poison cache, or desynchronize connections, exploit requires deployment behind proxies.

CVSS base score 7.5 /10
High
CISA KEV
Not listed
Public exploit
None known
EPSS
0.35% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
HTTP Request Smuggling
Impact
Broken Access Control, Web Cache Poisoning, Denial Of Service
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:H/A:N
Published
15 September 2026
Updated
15 October 2026
Weakness
CWE-444

Vendor fix

Upgrade to version 6.4.1 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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