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CVE-2024-14029— Tornado before 6.4.1 HTTP Request Smuggling via Transfer-Encoding

Quick assessment

Affected
tornadoweb tornado
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Tornado 在 6.4.1 版本之前会忽略重复的 头，将请求视为没有消息体，并将分块（chunked）消息体解析为后续的请求。当 Tornado 部署在代理服务器之后时，攻击者可以利用这种不一致性来实施 HTTP 请求走私（HTTP Request Smuggling），从而导致访问控制被绕过、缓存投毒（Cache Poisoning）或连接去同步（Connection Desynchronization）等问题。

CVSS 7.5 · High

Possible ATT&CK Techniques 1 AI

T1557 · Adversary-in-the-Middle

Affected Version Matrix 2

VendorProduct Version RangeStatus
tornadoweb tornado < 6.4.1 affected
6.4.1 unaffected
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I. Basic Information for CVE-2024-14029

Vulnerability Information
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Vulnerability Title
Tornado before 6.4.1 HTTP Request Smuggling via Transfer-Encoding
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
HTTP请求的解释不一致性(HTTP请求私运)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
tornadoweb tornado 0 ~ 6.4.1 -

II. Public POCs for CVE-2024-14029

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III. Intelligence Information for CVE-2024-14029

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Vendor Advisories for CVE-2024-14029 (2)

Same Patch Batch · tornadoweb · 2026-09-15 · 6 CVEs total

CVE-2023-54397 7.5 HIGH Tornado before 6.3.3 HTTP Request Smuggling via Content-Length
CVE-2026-91990 7.5 HIGH Tornado before 6.5.8 Memory Amplification DoS via multipart
CVE-2026-91992 5.9 MEDIUM Tornado before 6.5.7 Credential Leak via Handle Reuse
CVE-2026-91991 5.4 MEDIUM Tornado before 6.5.8 Cookie Attribute Injection via Capitalized kwargs
CVE-2024-58384 5.4 MEDIUM Tornado before 6.4.1 CRLF Injection via CurlAsyncHTTPClient

IV. Related Vulnerabilities

Same product: tornado
Same vendor: tornadoweb
Same weakness: CWE-444

V. Comments for CVE-2024-14029

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