Detections
Analytics

aioHTTP < 3.13.4 Multiple Vulnerabilities (CVE-2026-22815)

high Nessus Plugin ID 304811

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Synopsis

A Python library installed on the remote host is affected by a request smuggling vulnerability.

Description

The version of aioHTTP installed on the remote host is prior to 3.13.4. It is, therefore, affected by a request smuggling vulnerability:

 - AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to version 3.13.4, insufficient restrictions in header/trailer handling could cause uncapped memory usage. This issue has been patched in version 3.13.4. (CVE-2026-22815)

 - AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to version 3.13.4, a response with an excessive number of multipart headers may be allowed to use more memory than intended, potentially allowing a DoS vulnerability. This issue has been patched in version 3.13.4. (CVE-2026-34516)

 - AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to version 3.13.4, multiple Host headers were allowed in aiohttp. This issue has been patched in version 3.13.4. (CVE-2026-34525)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Solution

Upgrade to aioHTTP version 3.13.4 or later.

See Also

http://www.nessus.org/u?87081f38

http://www.nessus.org/u?fa714351

http://www.nessus.org/u?9e9be16a

http://www.nessus.org/u?12f236c9

http://www.nessus.org/u?260203a7

http://www.nessus.org/u?84153e33

http://www.nessus.org/u?e88e7f5f

http://www.nessus.org/u?25c1f4a5

Plugin Details

Severity: High

ID: 304811

File Name: aiohttp_3_13_4.nasl

Version: 1.3

Type: Local

Agent: unix

Family: Misc.

Published: 4/3/2026

Updated: 4/16/2026

Configuration: Enable thorough checks (optional)

Supported Sensors: Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.4

CVSS v2

Risk Factor: High

Base Score: 7.8

Temporal Score: 5.8

Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:N/A:N

CVSS Score Source: CVE-2026-34515

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

CVSS v4

Risk Factor: High

Base Score: 8.7

Threat Score: 6.6

Threat Vector: CVSS:4.0/E:U

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

CVSS Score Source: CVE-2026-34516

Vulnerability Information

CPE: cpe:/a:python:aiohttp

Required KB Items: Host/nix/packages, Host/nix/Python/Packages/Enumerated

Exploit Ease: No known exploits are available

Patch Publication Date: 4/1/2026

Vulnerability Publication Date: 4/1/2026

Reference Information

CVE: CVE-2026-22815, CVE-2026-34513, CVE-2026-34514, CVE-2026-34515, CVE-2026-34516, CVE-2026-34519, CVE-2026-34520, CVE-2026-34525

IAVB: 2026-B-0084