HTTP Request Smuggling Affecting python313-aiohttp package, versions <3.11.16-160000.3.1


Severity

Recommended
0.0
low
0
10

Based on SUSE Linux Enterprise Server security rating.

Threat Intelligence

EPSS
0.36% (28th percentile)

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  • Snyk IDSNYK-SLES1600-PYTHON313AIOHTTP-15317272
  • published19 Feb 2026
  • disclosed12 Feb 2026

Introduced: 12 Feb 2026

CVE-2025-53643  (opens in a new tab)
CWE-444  (opens in a new tab)

How to fix?

Upgrade SLES:16.0.0 python313-aiohttp to version 3.11.16-160000.3.1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream python313-aiohttp package and not the python313-aiohttp package as distributed by SLES. See How to fix? for SLES:16.0.0 relevant fixed versions and status.

AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to version 3.12.14, the Python parser is vulnerable to a request smuggling vulnerability due to not parsing trailer sections of an HTTP request. If a pure Python version of aiohttp is installed (i.e. without the usual C extensions) or AIOHTTP_NO_EXTENSIONS is enabled, then an attacker may be able to execute a request smuggling attack to bypass certain firewalls or proxy protections. Version 3.12.14 contains a patch for this issue.

CVSS Base Scores

version 3.1