Detections
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Echo: aiohttp, python-aiohttp: security update to 3.14.0

medium Tenable Cloud Security Plugin ID 460808

Description

There are packages installed that are affected by a vulnerability referenced in the following CVE:

 - AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to 3.14.0, attacker-
 controlled input included into multipart/payload headers can be used to modify a request to inject
 additional headers or similar. In the unlikely situation that an application is passing user-controlled
 strings into MultipartWriter.append(headers=...) or Payload.headers, then an attacker may be able to
 modify the request to inject headers or change the contents of the request. This vulnerability is fixed in
 3.14.0. (CVE-2026-50269)

Solution

Update the aiohttp library and its related packages to version 3.14.0 or later.

See Also

https://advisory.echohq.com/cve/CVE-2026-50269

Plugin Details

Severity: Medium

ID: 460808

Version: Revision 1.2

Type: Local

Published: 10/2/2026

Updated: 10/5/2026

Supported Sensors: Tenable Cloud Security, Tenable Self-Hosted Container Security

Risk Information

VPR

Risk Factor: Medium

Score: 5

Percentile: 93.95

CVSS v2

Risk Factor: High

Base Score: 7.8

Temporal Score: 5.8

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

CVSS Score Source: CVE-2026-50269

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:N/I:N/A:H

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

CVSS v4

Risk Factor: Medium

Base Score: 6.9

Threat Score: 2.7

Threat Vector: CVSS:4.0/E:U

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

Vulnerability Information

Exploit Ease: No known exploits are available

Patch Publication Date: 6/23/2026

Vulnerability Publication Date: 6/15/2026

Reference Information

CVE: CVE-2026-50269

IAVA: 2026-A-0636-S