Detections
Analytics

Echo: anyio: security update to 4.14.2

critical Tenable Cloud Security Plugin ID 463520

Description

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

 - AnyIO is a high level asynchronous concurrency and networking framework that works on top of either Trio
 or asyncio. Prior to 4.14.2, connect_tcp() and TLSStream.wrap() can validate internationalized host names
 after the standard library converts them with IDNA 2003 instead of IDNA 2008. When a connection to a non-
 ASCII domain is hijacked or redirected, an attacker can obtain a legitimate certificate for the different
 ASCII hostname produced by IDNA 2003 and present it to the client, causing the malicious endpoint's
 certificate to validate. This issue is fixed in version 4.14.2. (CVE-2026-63374)

Solution

Update the anyio library and its related packages to version 4.14.2 or later.

See Also

https://advisory.echohq.com/cve/CVE-2026-63374

Plugin Details

Severity: Critical

ID: 463520

Version: Revision 1.1

Type: Local

Published: 10/2/2026

Updated: 10/3/2026

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

Risk Information

VPR

Risk Factor: Medium

Score: 4.9

Percentile: 58.38

CVSS v2

Risk Factor: Medium

Base Score: 6.4

Temporal Score: 4.7

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

CVSS Score Source: CVE-2026-63374

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:H/A:N

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

CVSS v4

Risk Factor: Critical

Base Score: 9.3

Threat Score: 8

Threat Vector: CVSS:4.0/E:U

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

Vulnerability Information

Exploit Ease: No known exploits are available

Patch Publication Date: 9/20/2026

Vulnerability Publication Date: 9/18/2026

Reference Information

CVE: CVE-2026-63374