HTTP Response Splitting Affecting python313-aiohttp package, versions <3.11.16-160000.5.1


Severity

Recommended
0.0
low
0
10

Based on SUSE Linux Enterprise Server security rating.

Threat Intelligence

EPSS
0.4% (32nd percentile)

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  • Snyk IDSNYK-SLES1600-PYTHON313AIOHTTP-17439463
  • published24 Jun 2026
  • disclosed19 Jun 2026

Introduced: 19 Jun 2026

CVE-2026-34519  (opens in a new tab)
CWE-113  (opens in a new tab)

How to fix?

Upgrade SLES:16.0.0 python313-aiohttp to version 3.11.16-160000.5.1 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 3.13.4, an attacker who controls the reason parameter when creating a Response may be able to inject extra headers or similar exploits. This issue has been patched in version 3.13.4.

CVSS Base Scores

version 3.1