CRLF Injection Affecting python-aiohttp package, versions <3.14.0-1


Severity

Recommended
low

Based on default assessment until relevant scores are available.

Threat Intelligence

EPSS
0.3% (22nd percentile)

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  • Snyk IDSNYK-DEBIANUNSTABLE-PYTHONAIOHTTP-17401020
  • published23 Jun 2026
  • disclosed22 Jun 2026

Introduced: 22 Jun 2026

NewCVE-2026-50269  (opens in a new tab)
CWE-93  (opens in a new tab)
CWE-113  (opens in a new tab)

How to fix?

Upgrade Debian:unstable python-aiohttp to version 3.14.0-1 or higher.

NVD Description

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

AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to 3.14.0, attacker-controlled input included into multipart/payload headers can be used to modify a request to inject additional headers or similar. In the unlikely situation that an application is passing user-controlled strings into MultipartWriter.append(headers=...) or Payload.headers, then an attacker may be able to modify the request to inject headers or change the contents of the request. This vulnerability is fixed in 3.14.0.

CVSS Base Scores

version 3.1