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SCA: security update for io.netty:netty-resolver-dns (GHSA-5pvg-856g-cp85)

critical Tenable Cloud Security Plugin ID 444480

Description

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

 - Netty is a network application framework for development of protocol servers and clients. Prior to
 versions 4.1.135.Final and 4.2.15.Final, Netty's `DnsResolveContext` insufficiently validates the
 bailiwick of NS records, enabling DNS Cache Poisoning. An attacker controlling an authoritative name
 server for a subdomain can poison the cache for parent domains (like `.co.uk`). In
 `io.netty.resolver.dns.DnsResolveContext.AuthoritativeNameServerList#add` method accepts any NS record
 from the AUTHORITY section as long as the record's name is a suffix of the questionName. Subsequently, the
 `handleWithAdditional` method caches the associated A records from the ADDITIONAL section directly into
 the `authoritativeDnsServerCache` under the parent domain's key. This bypasses standard bailiwick rules,
 where a server authoritative for a subdomain should not be trusted to provide authoritative records for
 its parent. The poisoned cache is then used for all future resolutions under the parent domain's key.
 Versions 4.1.135.Final and 4.2.15.Final patch the issue. (CVE-2026-47691)

Solution

Update the io.netty:netty-resolver-dns library and its related packages to version 4.1.135.Final or later.

See Also

https://github.com/advisories/GHSA-5pvg-856g-cp85

Plugin Details

Severity: Critical

ID: 444480

Version: Revision 1.1

Type: Local

Family: SCA Checks

Published: 7/7/2026

Updated: 7/7/2026

Risk Information

VPR

Risk Factor: Medium

Score: 4.8

Percentile: 57.75

Vendor

Vendor Severity: High

CVSS v2

Risk Factor: High

Base Score: 9.4

Temporal Score: 7

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

CVSS Score Source: CVE-2026-47691

CVSS v3

Risk Factor: Critical

Base Score: 10

Temporal Score: 8.7

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

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

Vulnerability Information

Exploit Ease: No known exploits are available

Patch Publication Date: 6/8/2026

Vulnerability Publication Date: 6/8/2026

Reference Information

CVE: CVE-2026-47691