Description
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 fails to validate the origin (bailiwick) of CNAME records in DNS responses. Versions 4.1.135.Final and 4.2.15.Final patch the issue.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| netty | netty | >= 4.2.0.Final, < 4.2.15.Final, < 4.1.135.Final | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | netty | No fix yet | — |
| Debian 13 | netty | No fix yet | — |
| Debian 12 | netty | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | netty | No fix yet | — |
| Ubuntu 25.10 | netty | No fix yet | — |
Show 4 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 26.04 LTS | netty | No fix yet | — |
| Ubuntu Pro 24.04 LTS | netty | No fix yet | — |
| Ubuntu Pro 22.04 LTS | netty | No fix yet | — |
| Ubuntu Pro 20.04 LTS | netty | No fix yet | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat Single Sign On 7 | rh-sso7-keycloak +1 | 18.0.20-1.redhat_00001.1.el7sso | RHSA-2026:76130, RHSA-2026:76129, RHSA-2026:76128 |
| Red Hat Jboss Enterprise Application Platform Els 7 | eap7-activemq-artemis +15 | 2.16.0-22.redhat_00057.1.el7eap | RHSA-2026:53646, RHSA-2026:53645, RHSA-2026:53644 |
| Red Hat Jboss Enterprise Application Platform Els 7 | eap7-glassfish-jsf | 2.3.14-11.SP11_redhat_00001.1.el7eap | RHSA-2026:53646, RHSA-2026:53645, RHSA-2026:53644 |
| Red Hat Jboss Enterprise Application Platform Els 7 | eap7-ironjacamar +8 | 1.5.26-2.Final_redhat_00001.1.el7eap | RHSA-2026:53646, RHSA-2026:53645, RHSA-2026:53644 |
| Red Hat Jboss Enterprise Application Platform Els 7 | eap7-jackson-core +10 | 2.18.8-1.redhat_00003.1.el7eap | RHSA-2026:53646, RHSA-2026:53645, RHSA-2026:53644 |
| Red Hat Jboss Enterprise Application Platform Els 7 | eap7-jboss-remoting | 5.0.31-3.SP2_redhat_00001.1.el7eap | RHSA-2026:53646, RHSA-2026:53645, RHSA-2026:53644 |
| Red Hat Jboss Enterprise Application Platform Els 7 | eap7-jboss-server-migration +2 | 1.10.0-46.Final_redhat_00044.1.el7eap | RHSA-2026:53646, RHSA-2026:53645, RHSA-2026:53644 |
| Red Hat Jboss Enterprise Application Platform Els 7 | eap7-netty +26 | 4.1.135-1.Final_redhat_00001.1.el7eap | RHSA-2026:53646, RHSA-2026:53645, RHSA-2026:53644 |
| Red Hat Jboss Enterprise Application Platform Els 7 | eap7-picketlink-api +7 | 2.5.5-24.SP12_redhat_00016.1.el7eap | RHSA-2026:53646, RHSA-2026:53645, RHSA-2026:53644 |
| Red Hat Jboss Enterprise Application Platform Els 7 | eap7-picketlink-bindings +1 | 2.5.5-30.SP12_redhat_00020.1.el7eap | RHSA-2026:53646, RHSA-2026:53645, RHSA-2026:53644 |
| Red Hat Jboss Enterprise Application Platform Els 7 | eap7-undertow | 2.2.40-1.SP3_redhat_00001.1.el8eap | RHSA-2026:53646, RHSA-2026:53645, RHSA-2026:53644 |
| Red Hat Jboss Enterprise Application Platform Els 7 | eap7-wildfly +4 | 7.4.25-2.GA_redhat_00001.1.el7eap | RHSA-2026:53646, RHSA-2026:53645, RHSA-2026:53644 |
| Red Hat Jboss Enterprise Application Platform Els 7 | eap7-wildfly-java-jdk17 | 7.4.25-2.GA_redhat_00001.1.el8eap | RHSA-2026:53646, RHSA-2026:53645 |
| Red Hat JBoss EAP 8 | eap8-eap-product-conf-parent +1 | 801.7.1-1.GA_redhat_00001.1.el8eap | RHSA-2026:49700 |
| Red Hat JBoss EAP 8 | eap8-jose4j | 0.9.6-2.redhat_00002.1.el8eap | RHSA-2026:49700 |
| Red Hat JBoss EAP 8 | eap8-netty +14 | 4.1.135-1.Final_redhat_00001.1.el8eap | RHSA-2026:49700 |
| Red Hat JBoss EAP 8 | eap8-wildfly +3 | 8.1.7.1-1.GA_redhat_00004.1.el8eap | RHSA-2026:49700 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP7 | netty | 4.1.135-150200.4.50.1 | SUSE-SU-2026:2802-1 |
| SLES 15 SP7 | netty-tcnative | 2.0.79-150200.3.45.1 | SUSE-SU-2026:2802-1 |
| SLES 15 SP6 | netty-tcnative | 2.0.79-150200.3.45.1 | SUSE-SU-2026:2802-1 |
| SLES 15 SP5 | netty-tcnative | 2.0.79-150200.3.45.1 | SUSE-SU-2026:2802-1 |
| SLES 15 SP4 | netty-tcnative | 2.0.79-150200.3.45.1 | SUSE-SU-2026:2802-1 |
Show 5 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 15 SP6 | netty-tcnative | 2.0.79-150200.3.45.1 | SUSE-SU-2026:2802-1 |
| SLES for SAP 15 SP5 | netty-tcnative | 2.0.79-150200.3.45.1 | SUSE-SU-2026:2802-1 |
| SLES for SAP 15 SP4 | netty-tcnative | 2.0.79-150200.3.45.1 | SUSE-SU-2026:2802-1 |
| SLE HPC 15 SP5 | netty-tcnative | 2.0.79-150200.3.45.1 | SUSE-SU-2026:2802-1 |
| SLE HPC 15 SP4 | netty-tcnative | 2.0.79-150200.3.45.1 | SUSE-SU-2026:2802-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | netty | 4.1.135-1.1 | openSUSE-SU-2026:11033-1 |
Wolfi
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Wolfi rolling | akhq | 0.27.1-r3 | — |
| Wolfi rolling | apache-nifi | 2.9.0-r14 | — |
| Wolfi rolling | apache-pulsar-4.2 | 4.2.2-r3 | — |
| Wolfi rolling | apicurio-registry | 3.3.0-r3 | — |
| Wolfi rolling | celeborn-0.6 | 0.6.3-r7 | — |
| Wolfi rolling | druid | 37.0.0-r12 | — |
| Wolfi rolling | flyway | 12.8.1-r4 | — |
| Wolfi rolling | infinispan-16.1 | 16.1.4-r3 | — |
| Wolfi rolling | keycloak-26.5 +3 | No fix yet | — |
| Wolfi rolling | keycloak-26.6 +2 | 26.6.3-r3 | — |
| Wolfi rolling | management-api-for-apache-cassandra-5.0 | 0.1.120-r0 | — |
| Wolfi rolling | opensearch-3-discovery-ec2 +2 | 3.8.0-r3 | — |
| Wolfi rolling | opensearch-3-repository-azure | 3.6.0-r7 | — |
| Wolfi rolling | selenium-server | 4.44.0-r2 | — |
| Wolfi rolling | sonarqube | 26.8.0.126808-r0 | — |
| Wolfi rolling | spark-4.0-scala-2.13 | 4.0.3-r1 | — |
| Wolfi rolling | spark-4.1-scala-2.13 | 4.1.2-r4 | — |
| Wolfi rolling | strimzi-kafka-operator-kafka-init +5 | 1.0.0-r6 | — |
| Wolfi rolling | strimzi-kafka-operator-kafka-thirdparty-libs-cc | 1.0.0-r7 | — |
| Wolfi rolling | tez | 0.10.5-r16 | — |
| Wolfi rolling | thingsboard-tb-node +1 | 4.3.1.2-r5 | — |
| Wolfi rolling | trino +4 | 483-r7 | — |
| Wolfi rolling | trino-plugin-hive +8 | 481-r7 | — |
| Wolfi rolling | wildfly-openjdk-17 +1 | 40.0.0-r3 | — |
| Wolfi rolling | zipkin +1 | 3.6.1-r10 | — |
Public exploits
Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.
Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.
GitHub 1 repository
-
xiaoqiMikko/netty-resolver-dns-check ★ 0 · Sep 11, 2026
CVE-2026-45674 / CVE-2026-47691 / CVE-2026-45673: offline checker for DNS cache poisoning in io.netty:netty-resolver-dns - and whether your app actually uses that resolver. Spring WebClient on Reacto…
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| Maven | io.netty:netty-resolver-dns | >= 4.2.0.Final, < 4.2.15.Final | 4.2.15.Final | GHSA-676x-f7gg-47vc |
| Maven | io.netty:netty-resolver-dns | < 4.1.135.Final | 4.1.135.Final | GHSA-676x-f7gg-47vc |
Advisories 11
- WID-SEC-2026-1814 Netty: Mehrere Schwachstellen BSI CERT-Bund (WID) · Nov 11, 2026
- WID-SEC-2026-3376 Atlassian Bamboo, Bitbucket, Confluence, Fisheye/Crucible, Jira Software und Jira Service Management: Mehrere Schwachstellen BSI CERT-Bund (WID) · Nov 10, 2026
- RHSA-2026:76130 Red Hat Security Advisory: Red Hat Single Sign-On 7.6.13 security update on RHEL 9 Red Hat Security Advisories (RHSA) · Oct 20, 2026
- RHSA-2026:76129 Red Hat Security Advisory: Red Hat Single Sign-On 7.6.13 security update on RHEL 8 Red Hat Security Advisories (RHSA) · Oct 20, 2026
- RHSA-2026:76128 Red Hat Security Advisory: Red Hat Single Sign-On 7.6.13 security update on RHEL 7 Red Hat Security Advisories (RHSA) · Oct 20, 2026
- RHSA-2026:53646 Red Hat Security Advisory: Red Hat JBoss Enterprise Application Platform 7.4.25 Security update Red Hat Security Advisories (RHSA) · Oct 20, 2026
- RHSA-2026:53645 Red Hat Security Advisory: Red Hat JBoss Enterprise Application Platform 7.4.25 Security update Red Hat Security Advisories (RHSA) · Oct 20, 2026
- RHSA-2026:53644 Red Hat Security Advisory: Red Hat JBoss Enterprise Application Platform 7.4.25 security pdate Red Hat Security Advisories (RHSA) · Oct 20, 2026
- RHSA-2026:49700 Red Hat Security Advisory: Red Hat JBoss Enterprise Application Platform 8.1.7 security update Red Hat Security Advisories (RHSA) · Oct 20, 2026
- SUSE-SU-2026:2802-1 Security update for netty, netty-tcnative SUSE / openSUSE Security Updates · Jul 9, 2026
- openSUSE-SU-2026:11033-1 netty-4.1.135-1.1 on GA media SUSE / openSUSE Security Updates · Jun 16, 2026