Echo: io.netty:netty-codec-dns: security update to 4.1.133.Final

critical Tenable Cloud Security Plugin ID 463842

Description

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

- Netty is an asynchronous, event-driven network application framework. Prior to 4.2.13.Final and
4.1.133.Final, Netty's DNS codec does not enforce RFC 1035 domain name constraints during either encoding
or decoding. This creates a bidirectional attack surface: malicious DNS responses can exploit the decoder,
and user-influenced hostnames can exploit the encoder. This vulnerability is fixed in 4.2.13.Final and
4.1.133.Final. (CVE-2026-42579)

Solution

Update the io.netty:netty-codec-dns library and its related packages to version 4.1.133.Final or later.

Plugin Details

Severity: Critical

ID: 463842

Version: Revision 1.1

Type: Local

Family: Echo Local Security Checks

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: 4.3

Percentile: 53.62

CVSS v2

Risk Factor: High

Base Score: 9.4

Temporal Score: 7.4

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

CVSS Score Source: CVE-2026-42579

CVSS v3

Risk Factor: Critical

Base Score: 9.1

Temporal Score: 8.2

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

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

Vulnerability Information

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 9/28/2026

Vulnerability Publication Date: 5/7/2026

Reference Information

CVE: CVE-2026-42579

Detections

Analytics