HTTP Response Splitting Affecting python311-aiohttp package, versions <3.9.3-150400.10.43.1


Severity

Recommended
0.0
medium
0
10

Based on SUSE Linux Enterprise Server security rating.

Threat Intelligence

EPSS
0.4% (32nd percentile)

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  • Snyk IDSNYK-SLES156-PYTHON311AIOHTTP-18290801
  • published24 Jul 2026
  • disclosed23 Jul 2026

Introduced: 23 Jul 2026

CVE-2026-34514  (opens in a new tab)
CWE-113  (opens in a new tab)

How to fix?

Upgrade SLES:15.6 python311-aiohttp to version 3.9.3-150400.10.43.1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream python311-aiohttp package and not the python311-aiohttp package as distributed by SLES. See How to fix? for SLES:15.6 relevant fixed versions and status.

AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to version 3.13.4, an attacker who controls the content_type parameter in aiohttp could use this to inject extra headers or similar exploits. This issue has been patched in version 3.13.4.

CVSS Base Scores

version 3.1