Netty has Insufficient Bailiwick Validation for NS Records

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-47691
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-06-12 16:16:30 UTC
Updated2026-08-13 13:19:08 UTC
DescriptionNetty 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.

Risk And Classification

Primary CVSS: v3.1 10 CRITICAL from [email protected]

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N

EPSS: 0.002400000 probability, percentile 0.148590000 (date 2026-06-20)

Problem Types: CWE-345 | CWE-346 | CWE-345 CWE-345: Insufficient Verification of Data Authenticity | CWE-346 Origin Validation Error

VersionSourceTypeScoreSeverityVector
3.1[email protected]Primary10CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N
3.1ADPCVSS8.7HIGHCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N
3.1[email protected]Secondary8.7HIGHCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N
3.10b0ca135-0b70-47e7-9f44-1890c2a1c46cSecondary8.7HIGHCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N
3.1CNADECLARED8.7HIGHCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Changed
Confidentiality
High
Integrity
High
Availability
None

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Netty Netty All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Netty Netty affected >= 4.2.0.Final, < 4.2.15.Final Not specified
CNA Netty Netty affected < 4.1.135.Final Not specified
ADP Red Hat Cryostat 4 On RHEL 9 unaffected 4.2.0-13 * rpm Not specified
ADP Red Hat Cryostat 4 On RHEL 9 unaffected 4.2.0-13 * rpm Not specified
ADP Red Hat Cryostat 4 On RHEL 9 unaffected 4.2.0-13 * rpm Not specified
ADP Red Hat Red Hat Build Of Apache Camel 3.33 For Quarkus 3.33.2.SP1 unaffected resolver-dns * rpm Not specified
ADP Red Hat Red Hat Build Of Apache Camel 4.18.1.P1 For Spring Boot 3.5.16 unaffected resolver-dns * rpm Not specified
ADP Red Hat Red Hat Build Of Quarkus 3.27.4.SP1 unaffected resolver-dns * rpm Not specified
ADP Red Hat Red Hat Build Of Quarkus 3.33.2.SP1 unaffected resolver-dns * rpm Not specified
ADP Red Hat Red Hat Data Grid 8.6.2 unaffected resolver-dns * rpm Not specified
ADP Red Hat Red Hat JBoss Enterprise Application Platform 7.4.25 unaffected resolver-dns * rpm Not specified
ADP Red Hat Red Hat JBoss Enterprise Application Platform 7.4 ELS On RHEL 7 unaffected 0:2.16.0-22.redhat_00057.1.el7eap * rpm Not specified
ADP Red Hat Red Hat JBoss Enterprise Application Platform 7.4 ELS On RHEL 7 unaffected 0:2.3.14-11.SP11_redhat_00001.1.el7eap * rpm Not specified
ADP Red Hat Red Hat JBoss Enterprise Application Platform 7.4 ELS On RHEL 7 unaffected 0:1.5.26-2.Final_redhat_00001.1.el7eap * rpm Not specified
ADP Red Hat Red Hat JBoss Enterprise Application Platform 7.4 ELS On RHEL 7 unaffected 0:2.18.8-1.redhat_00003.1.el7eap * rpm Not specified
ADP Red Hat Red Hat JBoss Enterprise Application Platform 7.4 ELS On RHEL 7 unaffected 0:2.18.8-1.redhat_00003.1.el7eap * rpm Not specified
ADP Red Hat Red Hat JBoss Enterprise Application Platform 7.4 ELS On RHEL 7 unaffected 0:2.18.8-1.redhat_00003.1.el7eap * rpm Not specified
ADP Red Hat Red Hat JBoss Enterprise Application Platform 7.4 ELS On RHEL 7 unaffected 0:2.18.8-1.redhat_00003.1.el7eap * rpm Not specified
ADP Red Hat Red Hat JBoss Enterprise Application Platform 7.4 ELS On RHEL 7 unaffected 0:2.18.8-1.redhat_00003.1.el7eap * rpm Not specified
ADP Red Hat Red Hat JBoss Enterprise Application Platform 7.4 ELS On RHEL 7 unaffected 0:2.18.8-1.redhat_00003.1.el7eap * rpm Not specified
ADP Red Hat Red Hat JBoss Enterprise Application Platform 7.4 ELS On RHEL 7 unaffected 0:5.0.31-3.SP2_redhat_00001.1.el7eap * rpm Not specified
ADP Red Hat Red Hat JBoss Enterprise Application Platform 7.4 ELS On RHEL 7 unaffected 0:1.10.0-46.Final_redhat_00044.1.el7eap * rpm Not specified
ADP Red Hat Red Hat JBoss Enterprise Application Platform 7.4 ELS On RHEL 7 unaffected 0:4.1.135-1.Final_redhat_00001.1.el7eap * rpm Not specified
ADP Red Hat Red Hat JBoss Enterprise Application Platform 7.4 ELS On RHEL 7 unaffected 0:4.1.135-1.Final_redhat_00001.1.el7eap * rpm Not specified
ADP Red Hat Red Hat JBoss Enterprise Application Platform 7.4 ELS On RHEL 7 unaffected 0:2.5.5-30.SP12_redhat_00020.1.el7eap * rpm Not specified
ADP Red Hat Red Hat JBoss Enterprise Application Platform 7.4 ELS On RHEL 7 unaffected 0:2.5.5-24.SP12_redhat_00016.1.el7eap * rpm Not specified
ADP Red Hat Red Hat JBoss Enterprise Application Platform 7.4 ELS On RHEL 7 unaffected 0:2.2.40-2.SP3_redhat_00001.1.el7eap * rpm Not specified
ADP Red Hat Red Hat JBoss Enterprise Application Platform 7.4 ELS On RHEL 7 unaffected 0:7.4.25-2.GA_redhat_00001.1.el7eap * rpm Not specified
ADP Red Hat Red Hat JBoss Enterprise Application Platform 8.1 unaffected resolver-dns * rpm Not specified
ADP Red Hat Red Hat JBoss Enterprise Application Platform 8.1 For RHEL 10 unaffected 0:801.7.1-1.GA_redhat_00001.1.el10eap * rpm Not specified
ADP Red Hat Red Hat JBoss Enterprise Application Platform 8.1 For RHEL 10 unaffected 0:4.1.135-1.Final_redhat_00001.1.el10eap * rpm Not specified
ADP Red Hat Red Hat JBoss Enterprise Application Platform 8.1 For RHEL 10 unaffected 0:4.1.135-1.Final_redhat_00001.1.el10eap * rpm Not specified
ADP Red Hat Red Hat JBoss Enterprise Application Platform 8.1 For RHEL 10 unaffected 0:8.1.7.1-1.GA_redhat_00004.1.el10eap * rpm Not specified
ADP Red Hat Red Hat JBoss Enterprise Application Platform 8.1 For RHEL 8 unaffected 0:801.7.1-1.GA_redhat_00001.1.el8eap * rpm Not specified
ADP Red Hat Red Hat JBoss Enterprise Application Platform 8.1 For RHEL 8 unaffected 0:0.9.6-2.redhat_00002.1.el8eap * rpm Not specified
ADP Red Hat Red Hat JBoss Enterprise Application Platform 8.1 For RHEL 8 unaffected 0:4.1.135-1.Final_redhat_00001.1.el8eap * rpm Not specified
ADP Red Hat Red Hat JBoss Enterprise Application Platform 8.1 For RHEL 8 unaffected 0:4.1.135-1.Final_redhat_00001.1.el8eap * rpm Not specified
ADP Red Hat Red Hat JBoss Enterprise Application Platform 8.1 For RHEL 8 unaffected 0:8.1.7.1-1.GA_redhat_00004.1.el8eap * rpm Not specified
ADP Red Hat Red Hat JBoss Enterprise Application Platform 8.1 For RHEL 9 unaffected 0:801.7.1-1.GA_redhat_00001.1.el9eap * rpm Not specified
ADP Red Hat Red Hat JBoss Enterprise Application Platform 8.1 For RHEL 9 unaffected 0:0.9.6-2.redhat_00002.1.el9eap * rpm Not specified
ADP Red Hat Red Hat JBoss Enterprise Application Platform 8.1 For RHEL 9 unaffected 0:4.1.135-1.Final_redhat_00001.1.el9eap * rpm Not specified
ADP Red Hat Red Hat JBoss Enterprise Application Platform 8.1 For RHEL 9 unaffected 0:4.1.135-1.Final_redhat_00001.1.el9eap * rpm Not specified
ADP Red Hat Red Hat JBoss Enterprise Application Platform 8.1 For RHEL 9 unaffected 0:8.1.7.1-1.GA_redhat_00004.1.el9eap * rpm Not specified
ADP Red Hat Streams For Apache Kafka 2.9.4 unaffected resolver-dns * rpm Not specified
ADP Red Hat OpenShift Serverless Not specified Not specified
ADP Red Hat OpenShift Serverless Not specified Not specified
ADP Red Hat OpenShift Serverless Not specified Not specified
ADP Red Hat OpenShift Serverless Not specified Not specified
ADP Red Hat OpenShift Serverless Not specified Not specified
ADP Red Hat OpenShift Serverless Not specified Not specified
ADP Red Hat OpenShift Serverless Not specified Not specified
ADP Red Hat OpenShift Serverless Not specified Not specified
ADP Red Hat OpenShift Serverless Not specified Not specified
ADP Red Hat OpenShift Serverless Not specified Not specified
ADP Red Hat Red Hat Build Of Apache Camel 4 For Quarkus 3 Not specified Not specified
ADP Red Hat Red Hat Build Of Apache Camel - HawtIO 4 Not specified Not specified
ADP Red Hat Red Hat Build Of Apicurio Registry 3 Not specified Not specified
ADP Red Hat Red Hat Build Of Debezium 3 Not specified Not specified
ADP Red Hat Red Hat Build Of Keycloak Not specified Not specified
ADP Red Hat Red Hat Build Of Keycloak Not specified Not specified
ADP Red Hat Red Hat Build Of Keycloak Not specified Not specified
ADP Red Hat Red Hat Build Of Keycloak Not specified Not specified
ADP Red Hat Red Hat Build Of Keycloak Not specified Not specified
ADP Red Hat Red Hat Enterprise Linux AI RHEL AI 3 Not specified Not specified
ADP Red Hat Red Hat Enterprise Linux AI RHEL AI 3 Not specified Not specified
ADP Red Hat Red Hat Enterprise Linux AI RHEL AI 3 Not specified Not specified
ADP Red Hat Red Hat Fuse 7 Not specified Not specified
ADP Red Hat Red Hat JBoss Enterprise Application Platform Expansion Pack Not specified Not specified
ADP Red Hat Red Hat OpenShift AI RHOAI Not specified Not specified
ADP Red Hat Red Hat OpenShift AI RHOAI Not specified Not specified
ADP Red Hat Red Hat OpenShift AI RHOAI Not specified Not specified
ADP Red Hat Red Hat OpenShift AI RHOAI Not specified Not specified
ADP Red Hat Red Hat OpenShift AI RHOAI Not specified Not specified
ADP Red Hat Red Hat OpenShift AI RHOAI Not specified Not specified
ADP Red Hat Red Hat OpenShift AI RHOAI Not specified Not specified
ADP Red Hat Red Hat OpenShift AI RHOAI Not specified Not specified
ADP Red Hat Red Hat OpenShift Dev Spaces Not specified Not specified
ADP Red Hat Red Hat OpenShift Dev Spaces Not specified Not specified
ADP Red Hat Red Hat OpenShift Dev Spaces Not specified Not specified
ADP Red Hat Red Hat OpenShift Dev Spaces Not specified Not specified
ADP Red Hat Red Hat Single Sign-On 7 Not specified Not specified
ADP Red Hat Streams For Apache Kafka 3 Not specified Not specified

References

ReferenceSourceLinkTags
access.redhat.com/errata/RHSA-2026:26018 0b0ca135-0b70-47e7-9f44-1890c2a1c46c access.redhat.com
access.redhat.com/errata/RHSA-2026:26017 0b0ca135-0b70-47e7-9f44-1890c2a1c46c access.redhat.com
github.com/netty/netty/releases/tag/netty-4.1.135.Final [email protected] github.com Release Notes
access.redhat.com/errata/RHSA-2026:49700 0b0ca135-0b70-47e7-9f44-1890c2a1c46c access.redhat.com
access.redhat.com/errata/RHSA-2026:53806 0b0ca135-0b70-47e7-9f44-1890c2a1c46c access.redhat.com
access.redhat.com/errata/RHSA-2026:37390 0b0ca135-0b70-47e7-9f44-1890c2a1c46c access.redhat.com
access.redhat.com/errata/RHSA-2026:34608 0b0ca135-0b70-47e7-9f44-1890c2a1c46c access.redhat.com
access.redhat.com/errata/RHSA-2026:41951 0b0ca135-0b70-47e7-9f44-1890c2a1c46c access.redhat.com
access.redhat.com/errata/RHSA-2026:49701 0b0ca135-0b70-47e7-9f44-1890c2a1c46c access.redhat.com
access.redhat.com/errata/RHSA-2026:54435 0b0ca135-0b70-47e7-9f44-1890c2a1c46c access.redhat.com
github.com/netty/netty/security/advisories/GHSA-5pvg-856g-cp85 [email protected] github.com Vendor Advisory
access.redhat.com/errata/RHSA-2026:26586 0b0ca135-0b70-47e7-9f44-1890c2a1c46c access.redhat.com
security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-47691.json 0b0ca135-0b70-47e7-9f44-1890c2a1c46c security.access.redhat.com
access.redhat.com/security/cve/CVE-2026-47691 0b0ca135-0b70-47e7-9f44-1890c2a1c46c access.redhat.com
access.redhat.com/errata/RHSA-2026:53644 0b0ca135-0b70-47e7-9f44-1890c2a1c46c access.redhat.com
bugzilla.redhat.com/show_bug.cgi 0b0ca135-0b70-47e7-9f44-1890c2a1c46c bugzilla.redhat.com
access.redhat.com/errata/RHSA-2026:48151 0b0ca135-0b70-47e7-9f44-1890c2a1c46c access.redhat.com
github.com/netty/netty/releases/tag/netty-4.2.15.Final [email protected] github.com Release Notes
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Additional Advisory Data

SourceTimeEvent
ADP2026-06-12T16:02:45.855ZReported to Red Hat.
ADP2026-06-12T14:33:16.595ZMade public.

Solutions

ADP: RHSA-2026:49700: Red Hat JBoss EAP 8.1 for RHEL 10, Red Hat JBoss EAP 8.1 for RHEL 8, Red Hat JBoss EAP 8.1 for RHEL 9

ADP: RHSA-2026:53644: Red Hat JBoss EAP 7.4 ELS for RHEL 7 Server

ADP: RHSA-2026:48151: Cryostat 4 on RHEL 9

ADP: RHSA-2026:26586: Red Hat Build of Apache Camel 3.33 for Quarkus 3.33.2.SP1

ADP: RHSA-2026:41951: Red Hat Data Grid 8.6.2

ADP: RHSA-2026:53806: Red Hat JBoss Enterprise Application Platform 7.4.25

ADP: RHSA-2026:49701: Red Hat JBoss Enterprise Application Platform 8.1

ADP: RHSA-2026:37390: Red Hat build of Apache Camel 4.18.1.P1 for Spring Boot 3.5.16

ADP: RHSA-2026:26018: Red Hat build of Quarkus 3.27.4.SP1

ADP: RHSA-2026:26017: Red Hat build of Quarkus 3.33.2.SP1

ADP: RHSA-2026:34608: Streams for Apache Kafka 2.9.4

ADP: RHSA-2026:54435: Streams for Apache Kafka 3.2.1

Workarounds

ADP: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.

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