CVE-2026-34993

What it is

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.

At a glance

Exploitability

Can be exploited locally on the machine with an admin-level account, but needs a user to act. High risk of data tampering.

Exploit odds

0.2% chance of exploitation in the next 30 days (EPSS).

Fix

A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

1. 2026-06-02 20:16 UTC PublishedDisclosed publicly on CVE.org and NVD
2. 2026-09-04 13:19 UTC Last updatedMost recent change to the record

Details

Published

2026-06-02 20:16 UTC

Last modified

2026-09-04 13:19 UTC

Exploit probability

0.2% · EPSS, next 30 days

Weakness

CWE-502 · Unsafe deserialization

Record status

Modified

Affected

• Aiohttp < 3.14.0

Attack profile CVSS 3.1 · 6.4

Attack vector

Local

Complexity

High

Privileges needed

High

User interaction

Required

Scope

Changed

Confidentiality

Low

Integrity

High

Availability

Low