HTTP Response Splitting Affecting airflow-2 package, versions <2.11.2-r5


Severity

Recommended
low

Based on default assessment until relevant scores are available.

Threat Intelligence

EPSS
0.46% (37th percentile)

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  • Snyk IDSNYK-CHAINGUARDLATEST-AIRFLOW2-15989830
  • published12 Apr 2026
  • disclosed1 Apr 2026

Introduced: 1 Apr 2026

CVE-2026-34520  (opens in a new tab)
CWE-113  (opens in a new tab)

How to fix?

Upgrade Chainguard airflow-2 to version 2.11.2-r5 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream airflow-2 package and not the airflow-2 package as distributed by Chainguard. See How to fix? for Chainguard relevant fixed versions and status.

AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to version 3.13.4, the C parser (the default for most installs) accepted null bytes and control characters in response headers. This issue has been patched in version 3.13.4.

CVSS Base Scores

version 3.1