CriticalFix available
python-tornado — security advisory
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.
- Products
- python-tornado
- Affected versions
- 4.2.1-1ubuntu2, 4.2.1-1ubuntu3, 4.2.1-1ubuntu3.1, 4.2.1-1ubuntu3.1+esm1, 4.2.1-1ubuntu3.1+esm2, 4.2.1-1ubuntu3.1+esm3, 4.5.1-2.1~build2, 4.5.2-1, 4.5.3-1, 4.5.3-1ubuntu0.1, 4.5.3-1ubuntu0.2, 4.5.3-1ubuntu0.2+esm1, 4.5.3-1ubuntu0.2+esm2, 4.5.3-1ubuntu0.2+esm3, 6.1.0-1build1, 6.1.0-2, 6.1.0-3, 6.1.0-3build1, 6.1.0-3ubuntu0.1~esm1, 6.1.0-3ubuntu0.1~esm2, 6.1.0-3ubuntu0.1~esm4, 6.1.0-3ubuntu0.1~esm5, 6.3.2-1, 6.4.0-0ubuntu1, 6.4.0-1, 6.4.0-1build1, 6.4.0-1ubuntu0.1, 6.4.0-1ubuntu0.2, 6.4.0-1ubuntu0.4, 6.4.0-1ubuntu0.5
- Fixed versions
- 4.2.1-1ubuntu3.1+esm4, 4.5.3-1ubuntu0.2+esm4, 6.1.0-3ubuntu0.1~esm6, 6.4.0-1ubuntu0.6
- CVEs
- CVE-2024-14029
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 19:33 UTC · Revision 1
Source evidence
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.
osv:UBUNTU-CVE-2024-14029
python-tornado
Fixed versions: 4.2.1-1ubuntu3.1+esm4
python-tornado
Fixed versions: 4.5.3-1ubuntu0.2+esm4
python-tornado
Fixed versions: 6.1.0-3ubuntu0.1~esm6
python-tornado
Fixed versions: 6.4.0-1ubuntu0.6
Complete source record
{
"id": "88d27dadcd4f9bcc48180940d666c962881c0237cbcfe5a97d2fd36905a27c37",
"url": "https://osv.dev/vulnerability/UBUNTU-CVE-2024-14029",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "UBUNTU-CVE-2024-14029",
"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 deployed behind proxies to perform HTTP request smuggling, enabling access control bypass, cache poisoning, or connection desynchronization.",
"evidence": "osv:UBUNTU-CVE-2024-14029",
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{
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{
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{
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{
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{
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{
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{
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{
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{
"value": "6.1.0-3ubuntu0.1~esm4",
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{
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{
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"fixed_versions": [
{
"value": "6.4.0-1ubuntu0.6",
"evidence": "/affected/3/ranges"
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],
"affected_versions": [
{
"value": "6.3.2-1",
"evidence": "/affected/3/versions"
},
{
"value": "6.4.0-0ubuntu1",
"evidence": "/affected/3/versions"
},
{
"value": "6.4.0-1",
"evidence": "/affected/3/versions"
},
{
"value": "6.4.0-1build1",
"evidence": "/affected/3/versions"
},
{
"value": "6.4.0-1ubuntu0.1",
"evidence": "/affected/3/versions"
},
{
"value": "6.4.0-1ubuntu0.2",
"evidence": "/affected/3/versions"
},
{
"value": "6.4.0-1ubuntu0.4",
"evidence": "/affected/3/versions"
},
{
"value": "6.4.0-1ubuntu0.5",
"evidence": "/affected/3/versions"
}
]
}
],
"severity": "critical",
"structured": {
"id": "UBUNTU-CVE-2024-14029",
"aliases": [
"UBUNTU-CVE-2024-14029"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:H/A:N"
},
{
"type": "CVSS_V4",
"score": "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"
},
{
"type": "Ubuntu",
"score": "medium"
}
],
"affected": [
{
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{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
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{
"fixed": "4.2.1-1ubuntu3.1+esm4"
}
]
}
],
"package": {
"name": "python-tornado",
"purl": "pkg:deb/ubuntu/python-tornado?arch=source&distro=esm-infra-legacy%2Fxenial",
"ecosystem": "Ubuntu:Pro:16.04:LTS"
},
"versions": [
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"4.2.1-1ubuntu3",
"4.2.1-1ubuntu3.1",
"4.2.1-1ubuntu3.1+esm1",
"4.2.1-1ubuntu3.1+esm2",
"4.2.1-1ubuntu3.1+esm3"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2024/UBUNTU-CVE-2024-14029.json"
},
"ecosystem_specific": {
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{
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{
"binary_name": "python3-tornado",
"binary_version": "4.2.1-1ubuntu3.1+esm4"
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"availability": "Available with Ubuntu Pro with Legacy support add-on: https://ubuntu.com/pro"
}
},
{
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],
"modified": "2026-10-22T23:19:56.295596281Z",
"provider": "osv",
"upstream": [
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],
"references": [
"https://ubuntu.com/security/CVE-2024-14029",
"https://www.cve.org/CVERecord?id=CVE-2024-14029",
"https://ubuntu.com/security/notices/USN-8952-1"
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},
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"evidence": "/upstream"
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],
"security_relevant": true,
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},
"source_id": "core-osv",
"document_id": 410117,
"published_at": "2026-09-15T16:17:00+00:00"
}