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HTTP Request Smuggling The advisory has been revoked - it doesn't affect any version of package python-gunicorn.src  (opens in a new tab)

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EPSS
0.04% (12th percentile)

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  • Snyk IDSNYK-RHEL10-PYTHONGUNICORNSRC-15364006
  • published28 Feb 2026
  • disclosed15 Apr 2024
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Introduced: 15 Apr 2024

CVE-2024-1135  (opens in a new tab)
CWE-444  (opens in a new tab)

Amendment

The Red Hat security team deemed this advisory irrelevant for RHEL:10.

NVD Description

Note: Versions mentioned in the description apply only to the upstream python-gunicorn.src package and not the python-gunicorn.src package as distributed by RHEL.

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.