{"id":"CVE-2024-14029","title":"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","summary":"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 deploye…","severity":"high","cvss":7.5,"cvssVector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:H/A:N","cwe":["CWE-444"],"vendor":"tornadoweb","product":"tornado","affected":["tornado < 6.4.1"],"published":"2026-09-15","updated":"2026-09-16","sourceUpdated":"2026-09-16T13:42:48.607","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2024-14029","references":[{"url":"https://github.com/tornadoweb/tornado/security/advisories/GHSA-753j-mpmx-qq6g","label":"disclosure@vulncheck.com"},{"url":"https://www.vulncheck.com/advisories/tornado-before-6.4.1-http-request-smuggling-via-transfer-encoding","label":"disclosure@vulncheck.com"},{"url":"https://github.com/tornadoweb/tornado/security/advisories/GHSA-753j-mpmx-qq6g","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"},{"url":"https://github.com/tornadoweb/tornado/commit/d65f6e71a77f53a1ff0a0dc55704be13f04eb572"},{"url":"https://github.com/tornadoweb/tornado"}],"tags":["nvd","cve.org","exploit-available","osv","pip","score-dispute"],"exploitAvailable":true,"ssvc":{"exploitation":"poc","automatable":"no","technicalImpact":"partial","timestamp":"2026-09-15T17:07:58.664131Z"},"ingestedAt":"2026-09-15T15:39:12.928Z","aliases":["GHSA-753j-mpmx-qq6g"],"ecosystem":"pip","patched":["tornado 6.4.1"],"scores":{"nvd":7.5,"osv":5.3},"epss":0.00351,"epssPercentile":0.28859,"slug":"CVE-2024-14029","body":"## Overview\n\nTornado 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Package advisory (CVE-2024-14029)\n\nAffected packages:\n\n- `tornado < 6.4.1`\n\nPatched in:\n\n- `tornado 6.4.1`\n\nSource: https://osv.dev/vulnerability/GHSA-753j-mpmx-qq6g","depth":"midnight","depthScore":53,"depthScoreParts":{"impact":41.3,"likelihood":0.1,"exploitation":12,"ransomware":0},"changes":[{"seq":204358,"id":"CVE-2024-14029","ts":1789494100422,"field":"exploit_available","old":"false","new":"true"}]}