HTTP Request Smuggling Affecting airflow-3 package, versions <3.3.1-r0


Severity

Recommended
low

Based on default assessment until relevant scores are available.

Threat Intelligence

EPSS
0.44% (37th percentile)

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  • Snyk IDSNYK-CHAINGUARDLATEST-AIRFLOW3-18748198
  • published13 Aug 2026
  • disclosed6 Aug 2026

Introduced: 6 Aug 2026

CVE-2026-71554  (opens in a new tab)
CWE-444  (opens in a new tab)

How to fix?

Upgrade Chainguard airflow-3 to version 3.3.1-r0 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream airflow-3 package and not the airflow-3 package as distributed by Chainguard. See How to fix? for Chainguard relevant fixed versions and status.

h2 is a pure-Python implementation of a HTTP/2 protocol stack. Versions up to and including 4.4.0 accept request header blocks containing more than one Host header, and forward every Host header to the consuming application. Where the consumer downgrades HTTP/2 to HTTP/1.1, the resulting request carries two Host header lines, providing a request smuggling primitive. This issue is fixed in version 4.4.1.

CVSS Base Scores

version 3.1