CVE-2026-34514 LOW

CVE-2026-34514: AIOHTTP: CRLF injection in multipart part content type header construction

Vendor Aio-Libs
Product aiohttp
Weakness CWE-113 · HTTP response splitting
Published April 1, 2026
Last update April 2, 2026
View on NVD All CVEs

CVSS base score

2.7/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality —
Integrity —

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

April 1, 2026 CVE published
April 2, 2026 Record updated