CVE-2026-34993 MEDIUM

CVE-2026-34993: AIOHTTP Vulnerable to Deserialization of Untrusted Data

Vendor Aio-Libs
Product aiohttp
Weakness CWE-502 · Unsafe deserialization
Published June 2, 2026
Last update June 30, 2026

CVSS base score

6.4/10
Attack vector Local
Attack complexity High
Privileges required High
User interaction Required
Confidentiality Low
Integrity High

CVSS vector

CVSS:3.1/AV:L/AC:H/PR:H/UI:R/S:C/C:L/I:H/A:L

What the vulnerability does

01Description

AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to version 3.14.0, using ``CookieJar.load()`` with untrusted input may allow arbitrary code execution. Most applications using this function will be doing so with the user's own data, so this is unlikely to affect many applications. Version 3.14.0 patches the issue. If an application does allow attacker controlled files to be loaded, a workaround on older releases would be to sanitize the files before loading.

Key dates

02Disclosure timeline

June 2, 2026 CVE published
June 30, 2026 Record updated