Detections
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SCA: security update for io.netty:netty-codec-dns (GHSA-mfg7-5gfp-c4w3)

medium Tenable Cloud Security Plugin ID 445266

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 4.1.136.Final and
 4.2.16.Final, io.netty.handler.codec.dns.AbstractDnsRecord,
 io.netty.handler.codec.dns.DefaultDnsRecordDecoder.decodeRecord(), and
 io.netty.handler.codec.dns.DnsCodecUtil.decompressDomainName() failed to release retained or newly
 allocated ByteBuf objects when IDN.toASCII() or encodeDomainName() rejected a malformed domain name,
 allowing unauthenticated remote DNS packets to leak direct memory incrementally until denial of service.
 This issue is fixed in versions 4.1.136.Final and 4.2.16.Final. (CVE-2026-73508)

Solution

Update the io.netty:netty-codec-dns library and its related packages to version 4.1.136.Final or later.

See Also

https://github.com/advisories/GHSA-mfg7-5gfp-c4w3

Plugin Details

Severity: Medium

ID: 445266

Version: Revision 1.2

Type: Local

Family: SCA Checks

Published: 7/24/2026

Updated: 8/13/2026

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

Risk Information

Vendor

Vendor Severity: Medium

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 3.7

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

CVSS Score Source: CVE-2026-73508

CVSS v3

Risk Factor: Medium

Base Score: 5.3

Temporal Score: 4.6

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

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

Vulnerability Information

Exploit Ease: No known exploits are available

Patch Publication Date: 7/24/2026

Vulnerability Publication Date: 7/24/2026

Reference Information

CVE: CVE-2026-73508

cwe: CWE-772