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

Quick assessment

Affected
aio-libs aiohttp
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

aiohttp是aio-libs开源的一个开源的用于 asyncio 和 Python 的异步 HTTP 客户端/服务器框架。 AIOHTTP 3.14.0之前版本存在代码问题漏洞，该漏洞源于使用CookieJar.load()处理不可信输入时可能导致任意代码执行。

CVSS 6.4 · Medium EPSS 0.50% · P40

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

VendorProduct Version RangeStatus
aio-libs aiohttp < 3.14.0 affected
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I. Basic Information for CVE-2026-34993

Vulnerability Information
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Vulnerability Title
AIOHTTP Vulnerable to Deserialization of Untrusted Data
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:H/PR:H/UI:R/S:C/C:L/I:H/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
可信数据的反序列化
Source: CVE Program / CVE List V5
Vulnerability Title
aiohttp 代码问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
aiohttp是aio-libs开源的一个开源的用于 asyncio 和 Python 的异步 HTTP 客户端/服务器框架。 AIOHTTP 3.14.0之前版本存在代码问题漏洞，该漏洞源于使用CookieJar.load()处理不可信输入时可能导致任意代码执行。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
aio-libs aiohttp < 3.14.0 -

II. Public POCs for CVE-2026-34993

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III. Intelligence Information for CVE-2026-34993

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Patches & Fixes for CVE-2026-34993 (1)

Vendor Advisories for CVE-2026-34993 (1)

IV. Related Vulnerabilities

Same product: aiohttp
Same vendor: aio-libs
Same weakness: CWE-502

V. Comments for CVE-2026-34993

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