OESA-2026-3658 (CVE-2024-1135)
Vulnerability from osv_openeuler – Published: 2026-09-05 15:03 – Updated: 2026-09-05 15:03 – Source websiteGunicorn(Green Unicorn) is a Python WSGI HTTP Server for UNIX. It's a pre-fork worker model ported from Ruby's Unicorn_ project. The Gunicorn server is broadly compatible with various web frameworks, simply implemented, light on server resource usage, and fairly speedy.
Security Fix(es):
Gunicorn fails to properly validate Transfer-Encoding headers, leading to HTTP Request Smuggling (HRS) vulnerabilities. By crafting requests with conflicting Transfer-Encoding headers, attackers can bypass security restrictions and access restricted endpoints. This issue is due to Gunicorn's handling of Transfer-Encoding headers, where it incorrectly processes requests with multiple, conflicting Transfer-Encoding headers, treating them as chunked regardless of the final encoding specified. This vulnerability allows for a range of attacks including cache poisoning, session manipulation, and data exposure.(CVE-2024-1135)
| URL | Type | |
|---|---|---|
{
"affected": [
{
"ecosystem_specific": {
"noarch": [
"python-gunicorn-help-21.2.0-3.oe2403sp4.noarch.rpm",
"python3-gunicorn-21.2.0-3.oe2403sp4.noarch.rpm"
],
"src": [
"python-gunicorn-21.2.0-3.oe2403sp4.src.rpm"
]
},
"package": {
"ecosystem": "openEuler:24.03-LTS-SP4",
"name": "python-gunicorn",
"purl": "pkg:rpm/openEuler/python-gunicorn\u0026distro=openEuler-24.03-LTS-SP4"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "21.2.0-3.oe2403sp4"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"database_specific": {
"severity": "High"
},
"details": "Gunicorn(Green Unicorn) is a Python WSGI HTTP Server for UNIX. It\u0026amp;apos;s a pre-fork worker model ported from Ruby\u0026amp;apos;s Unicorn_ project. The Gunicorn server is broadly compatible with various web frameworks, simply implemented, light on server resource usage, and fairly speedy.\r\n\r\nSecurity Fix(es):\n\nGunicorn fails to properly validate Transfer-Encoding headers, leading to HTTP Request Smuggling (HRS) vulnerabilities. By crafting requests with conflicting Transfer-Encoding headers, attackers can bypass security restrictions and access restricted endpoints. This issue is due to Gunicorn\u0026apos;s handling of Transfer-Encoding headers, where it incorrectly processes requests with multiple, conflicting Transfer-Encoding headers, treating them as chunked regardless of the final encoding specified. This vulnerability allows for a range of attacks including cache poisoning, session manipulation, and data exposure.(CVE-2024-1135)",
"id": "OESA-2026-3658",
"modified": "2026-09-05T15:03:35Z",
"published": "2026-09-05T15:03:35Z",
"references": [
{
"type": "ADVISORY",
"url": "https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-3658"
},
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-1135"
}
],
"schema_version": "1.7.2",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
"type": "CVSS_V3"
}
],
"summary": "python-gunicorn security update",
"upstream": [
"CVE-2024-1135"
]
}
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
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- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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