{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-47691","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","state":"PUBLISHED","assignerShortName":"GitHub_M","dateReserved":"2026-05-19T21:18:20.403Z","datePublished":"2026-06-12T14:33:16.595Z","dateUpdated":"2026-07-09T12:09:26.646Z"},"containers":{"cna":{"title":"Netty has Insufficient Bailiwick Validation for NS Records","problemTypes":[{"descriptions":[{"cweId":"CWE-345","lang":"en","description":"CWE-345: Insufficient Verification of Data Authenticity","type":"CWE"}]}],"metrics":[{"cvssV3_1":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":8.7,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"CHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N","version":"3.1"}}],"references":[{"name":"https://github.com/netty/netty/security/advisories/GHSA-5pvg-856g-cp85","tags":["x_refsource_CONFIRM"],"url":"https://github.com/netty/netty/security/advisories/GHSA-5pvg-856g-cp85"},{"name":"https://github.com/netty/netty/releases/tag/netty-4.1.135.Final","tags":["x_refsource_MISC"],"url":"https://github.com/netty/netty/releases/tag/netty-4.1.135.Final"},{"name":"https://github.com/netty/netty/releases/tag/netty-4.2.15.Final","tags":["x_refsource_MISC"],"url":"https://github.com/netty/netty/releases/tag/netty-4.2.15.Final"}],"affected":[{"vendor":"netty","product":"netty","versions":[{"version":">= 4.2.0.Final, < 4.2.15.Final","status":"affected"},{"version":"< 4.1.135.Final","status":"affected"}]}],"providerMetadata":{"orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M","dateUpdated":"2026-06-12T14:33:16.595Z"},"descriptions":[{"lang":"en","value":"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."}],"source":{"advisory":"GHSA-5pvg-856g-cp85","discovery":"UNKNOWN"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-06-12T00:00:00+00:00","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3","id":"CVE-2026-47691"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-06-13T03:56:03.157Z"}},{"affected":[{"cpes":["cpe:/a:redhat:apache_camel_quarkus:3.33"],"defaultStatus":"affected","product":"Red Hat Build of Apache Camel 3.33 for Quarkus 3.33.2.SP1","vendor":"Red Hat"},{"cpes":["cpe:/a:redhat:quarkus:3.27::el8"],"defaultStatus":"affected","product":"Red Hat build of Quarkus 3.27.4.SP1","vendor":"Red Hat"},{"cpes":["cpe:/a:redhat:quarkus:3.33::el8"],"defaultStatus":"affected","product":"Red Hat build of Quarkus 3.33.2.SP1","vendor":"Red Hat"},{"cpes":["cpe:/a:redhat:amq_streams:2.9::el9"],"defaultStatus":"affected","product":"Streams for Apache Kafka 2.9.4","vendor":"Red Hat"},{"cpes":["cpe:/a:redhat:cryostat:4"],"defaultStatus":"affected","product":"Cryostat 4","vendor":"Red Hat"},{"cpes":["cpe:/a:redhat:serverless:1"],"defaultStatus":"affected","product":"OpenShift Serverless","vendor":"Red Hat"},{"cpes":["cpe:/a:redhat:apache_camel_hawtio:4"],"defaultStatus":"affected","product":"Red Hat build of Apache Camel - HawtIO 4","vendor":"Red Hat"},{"cpes":["cpe:/a:redhat:camel_quarkus:3"],"defaultStatus":"affected","product":"Red Hat build of Apache Camel 4 for Quarkus 3","vendor":"Red Hat"},{"cpes":["cpe:/a:redhat:camel_spring_boot:4"],"defaultStatus":"affected","product":"Red Hat build of Apache Camel for Spring Boot 4","vendor":"Red Hat"},{"cpes":["cpe:/a:redhat:apicurio_registry:3"],"defaultStatus":"affected","product":"Red Hat build of Apicurio Registry 3","vendor":"Red Hat"},{"cpes":["cpe:/a:redhat:debezium:3"],"defaultStatus":"affected","product":"Red Hat build of Debezium 3","vendor":"Red Hat"},{"cpes":["cpe:/a:redhat:build_keycloak:"],"defaultStatus":"affected","product":"Red Hat Build of Keycloak","vendor":"Red Hat"},{"cpes":["cpe:/a:redhat:jboss_data_grid:8"],"defaultStatus":"affected","product":"Red Hat Data Grid 8","vendor":"Red Hat"},{"cpes":["cpe:/a:redhat:jboss_fuse:7"],"defaultStatus":"affected","product":"Red Hat Fuse 7","vendor":"Red Hat"},{"cpes":["cpe:/a:redhat:jboss_enterprise_application_platform:7"],"defaultStatus":"affected","product":"Red Hat JBoss Enterprise Application Platform 7","vendor":"Red Hat"},{"cpes":["cpe:/a:redhat:jboss_enterprise_application_platform:8"],"defaultStatus":"affected","product":"Red Hat JBoss Enterprise Application Platform 8","vendor":"Red Hat"},{"cpes":["cpe:/a:redhat:jbosseapxp"],"defaultStatus":"affected","product":"Red Hat JBoss Enterprise Application Platform Expansion Pack","vendor":"Red Hat"},{"cpes":["cpe:/a:redhat:openshift_ai"],"defaultStatus":"affected","product":"Red Hat OpenShift AI (RHOAI)","vendor":"Red Hat"},{"cpes":["cpe:/a:redhat:openshift_devspaces:3"],"defaultStatus":"affected","product":"Red Hat OpenShift Dev Spaces","vendor":"Red Hat"},{"cpes":["cpe:/a:redhat:amq_streams:3"],"defaultStatus":"affected","product":"streams for Apache Kafka 3","vendor":"Red Hat"},{"cpes":["cpe:/a:redhat:enterprise_linux_ai:3"],"defaultStatus":"unaffected","product":"Red Hat Enterprise Linux AI (RHEL AI) 3","vendor":"Red Hat"},{"cpes":["cpe:/a:redhat:red_hat_single_sign_on:7"],"defaultStatus":"unaffected","product":"Red Hat Single Sign-On 7","vendor":"Red Hat"}],"datePublic":"2026-06-12T14:33:16.595Z","descriptions":[{"lang":"en","value":"A flaw was found in Netty's `DnsResolveContext`. An attacker controlling an authoritative name server for a subdomain can exploit this vulnerability by providing crafted NS records that are insufficiently validated. This allows the attacker to poison the DNS cache for parent domains, bypassing standard bailiwick rules. Consequently, future DNS resolutions for the affected parent domain will use the poisoned cache, potentially redirecting users to malicious servers and leading to information disclosure or integrity compromise."}],"metrics":[{"other":{"content":{"namespace":"https://access.redhat.com/security/updates/classification/","value":"Important"},"type":"Red Hat severity rating"}},{"cvssV3_1":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":8.7,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"CHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N","version":"3.1"},"format":"CVSS"}],"problemTypes":[{"descriptions":[{"cweId":"CWE-346","description":"Origin Validation Error","lang":"en","type":"CWE"}]}],"references":[{"tags":["vdb-entry","x_refsource_REDHAT"],"url":"https://access.redhat.com/security/cve/CVE-2026-47691"},{"name":"RHBZ#2488439","tags":["issue-tracking","x_refsource_REDHAT"],"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2488439"},{"tags":["x_sadp-csaf-vex"],"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-47691.json"},{"tags":["vendor-advisory","x_refsource_REDHAT"],"url":"https://access.redhat.com/errata/RHSA-2026:26586"},{"tags":["vendor-advisory","x_refsource_REDHAT"],"url":"https://access.redhat.com/errata/RHSA-2026:26018"},{"tags":["vendor-advisory","x_refsource_REDHAT"],"url":"https://access.redhat.com/errata/RHSA-2026:26017"},{"tags":["vendor-advisory","x_refsource_REDHAT"],"url":"https://access.redhat.com/errata/RHSA-2026:34608"}],"solutions":[{"lang":"en","value":"RHSA-2026:26586: Red Hat Build of Apache Camel 3.33 for Quarkus 3.33.2.SP1"},{"lang":"en","value":"RHSA-2026:26018: Red Hat build of Quarkus 3.27.4.SP1"},{"lang":"en","value":"RHSA-2026:26017: Red Hat build of Quarkus 3.33.2.SP1"},{"lang":"en","value":"RHSA-2026:34608: Streams for Apache Kafka 2.9.4"}],"timeline":[{"lang":"en","time":"2026-06-12T16:02:45.855Z","value":"Reported to Red Hat."},{"lang":"en","time":"2026-06-12T14:33:16.595Z","value":"Made public."}],"title":"io.netty/netty-resolver-dns: Netty has Insufficient Bailiwick Validation for NS Records","workarounds":[{"lang":"en","value":"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."}],"x_adpType":"supplier","x_generator":{"engine":"sadp-cli 1.0.0"},"providerMetadata":{"orgId":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c","shortName":"redhat-SADP","dateUpdated":"2026-07-09T12:09:26.646Z"}}]}}