--- 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 patched: - tornado 6.4.1 published: '2026-09-15' updated: '2026-09-28' sourceUpdated: '2026-09-28T14:10:00.213' 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' - url: >- https://security.access.redhat.com/data/csaf/v2/vex/2024/cve-2024-14029.json - url: 'https://access.redhat.com/security/cve/CVE-2024-14029' - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2533918' - url: 'https://www.cve.org/CVERecord?id=CVE-2024-14029' - url: 'https://nvd.nist.gov/vuln/detail/CVE-2024-14029' - url: 'https://access.redhat.com/errata/RHSA-2024:10836' - url: 'https://access.redhat.com/errata/RHSA-2024:10843' - url: 'https://access.redhat.com/errata/RHSA-2024:10590' - url: 'https://access.redhat.com/errata/RHSA-2025:3108' - url: 'https://access.redhat.com/errata/RHSA-2025:2470' - url: 'https://access.redhat.com/errata/RHSA-2025:2471' - url: 'https://access.redhat.com/errata/RHSA-2026:84798' - url: 'https://access.redhat.com/errata/RHSA-2026:84843' - url: 'https://access.redhat.com/errata/RHSA-2026:84844' tags: - nvd - cve.org - exploit-available - osv - pip - csaf - vex - red-hat - score-dispute epss: 0.00361 epssPercentile: 0.2973 aliases: - GHSA-753j-mpmx-qq6g ecosystem: pip exploitAvailable: true ssvc: exploitation: poc automatable: 'no' technicalImpact: partial timestamp: '2026-09-15T17:07:58.664131Z' scores: nvd: 7.5 osv: 5.3 vendor: 7.5 ingestedAt: '2026-09-15T15:39:12.928Z' --- ## Overview 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. ## Remediation Refer to the linked advisories for vendor-supplied fixes and affected version ranges. ## Package advisory (CVE-2024-14029) Affected packages: - `tornado < 6.4.1` Patched in: - `tornado 6.4.1` Source: https://osv.dev/vulnerability/GHSA-753j-mpmx-qq6g ## Vendor advisories - **RHSA-2024:10836** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream EUS (v.9.2) · released 2024-12-05 · [advisory](https://access.redhat.com/errata/RHSA-2024:10836) - **RHSA-2024:10843** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream EUS (v.9.4) · released 2024-12-05 · [advisory](https://access.redhat.com/errata/RHSA-2024:10843) - **RHSA-2024:10590** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream (v. 9) · released 2024-12-02 · [advisory](https://access.redhat.com/errata/RHSA-2024:10590) - **RHSA-2025:3108** · Red Hat · fixed in: Red Hat Enterprise Linux High Availability EUS (v.9.2), Red Hat Enterprise Linux Resilient Storage EUS (v.9.2) · released 2025-03-24 · [advisory](https://access.redhat.com/errata/RHSA-2025:3108) - **RHSA-2025:2470** · Red Hat · fixed in: Red Hat Enterprise Linux High Availability EUS (v.9.4), Red Hat Enterprise Linux Resilient Storage EUS (v.9.4) · released 2025-03-10 · [advisory](https://access.redhat.com/errata/RHSA-2025:2470) - **RHSA-2025:2471** · Red Hat · fixed in: Red Hat Enterprise Linux High Availability (v. 9), Red Hat Enterprise Linux Resilient Storage (v. 9) · released 2025-03-10 · [advisory](https://access.redhat.com/errata/RHSA-2025:2471) - **Red Hat VEX** · Important · affected: Red Hat Enterprise Linux 7, Red Hat Enterprise Linux AI (RHEL AI) 3, Red Hat OpenStack Platform 16.2 · no fix planned: Red Hat Enterprise Linux AI (RHEL AI) 3, Red Hat Enterprise Linux 7, Red Hat OpenStack Platform 16.2 · updated 2026-10-19 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2024/cve-2024-14029.json) - **RHSA-2026:84798** · Red Hat · fixed in: Red Hat Enterprise Linux HighAvailability (v. 8), Red Hat Enterprise Linux ResilientStorage (v. 8) · released 2026-10-19 · [advisory](https://access.redhat.com/errata/RHSA-2026:84798) - **RHSA-2026:84843** · Red Hat · fixed in: Red Hat Enterprise Linux High Availability AUS (v.8.4), Red Hat Enterprise Linux HighAvailability EUS EXTENSION (v.8.4) · released 2026-10-19 · [advisory](https://access.redhat.com/errata/RHSA-2026:84843) - **RHSA-2026:84844** · Red Hat · fixed in: Red Hat Enterprise Linux High Availability E4S (v.8.8), Red Hat Enterprise Linux High Availability TUS (v.8.8) · released 2026-10-19 · [advisory](https://access.redhat.com/errata/RHSA-2026:84844)