CVE-2026-66785

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-66785", "assignerOrgId": "53f830b8-0a3f-465b-8143-3b8a9948e749", "state": "PUBLISHED", "assignerShortName": "redhat", "dateReserved": "2026-07-27T17:51:24.885Z", "datePublished": "2026-08-20T18:15:06.802Z", "dateUpdated": "2026-10-19T17:30:24.677Z"}, "containers": {"cna": {"title": "Submariner: submariner: missing validation of remote endpoint subnets and clusterid enables cross-cluster traffic hijack", "metrics": [{"other": {"content": {"value": "Moderate", "namespace": "https://access.redhat.com/security/updates/classification/"}, "type": "Red Hat severity rating"}}, {"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 8.7, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "HIGH", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:N", "version": "3.1"}, "format": "CVSS"}], "descriptions": [{"lang": "en", "value": "A flaw was found in Submariner. This vulnerability allows a malicious cluster (spoke) to redirect network traffic from other connected clusters (peer clusters) by publishing a specially crafted network endpoint. The system fails to properly validate the network subnets provided by the malicious cluster, enabling it to declare arbitrary network ranges. Consequently, all network traffic intended for these arbitrary ranges from peer clusters will be rerouted through the attacker's tunnel, potentially leading to unauthorized information disclosure or network disruption."}], "affected": [{"vendor": "Red Hat", "product": "Red Hat Advanced Cluster Management for Kubernetes 2.16", "collectionURL": "https://catalog.redhat.com/software/containers/", "packageName": "rhacm2/lighthouse-agent-rhel9", "defaultStatus": "affected", "versions": [{"version": "1790670439", "lessThan": "*", "versionType": "rpm", "status": "unaffected"}], "cpes": ["cpe:/a:redhat:acm:2.16::el9"]}, {"vendor": "Red Hat", "product": "Red Hat Advanced Cluster Management for Kubernetes 2.16", "collectionURL": "https://catalog.redhat.com/software/containers/", "packageName": "rhacm2/lighthouse-coredns-rhel9", "defaultStatus": "affected", "versions": [{"version": "1790670231", "lessThan": "*", "versionType": "rpm", "status": "unaffected"}], "cpes": ["cpe:/a:redhat:acm:2.16::el9"]}, {"vendor": "Red Hat", "product": "Red Hat Advanced Cluster Management for Kubernetes 2.16", "collectionURL": "https://catalog.redhat.com/software/containers/", "packageName": "rhacm2/subctl-rhel9", "defaultStatus": "affected", "versions": [{"version": "1790670243", "lessThan": "*", "versionType": "rpm", "status": "unaffected"}], "cpes": ["cpe:/a:redhat:acm:2.16::el9"]}, {"vendor": "Red Hat", "product": "Red Hat Advanced Cluster Management for Kubernetes 2.16", "collectionURL": "https://catalog.redhat.com/software/containers/", "packageName": "rhacm2/submariner-gateway-rhel9", "defaultStatus": "affected", "versions": [{"version": "1790670508", "lessThan": "*", "versionType": "rpm", "status": "unaffected"}], "cpes": ["cpe:/a:redhat:acm:2.16::el9"]}, {"vendor": "Red Hat", "product": "Red Hat Advanced Cluster Management for Kubernetes 2.16", "collectionURL": "https://catalog.redhat.com/software/containers/", "packageName": "rhacm2/submariner-globalnet-rhel9", "defaultStatus": "affected", "versions": [{"version": "1790670233", "lessThan": "*", "versionType": "rpm", "status": "unaffected"}], "cpes": ["cpe:/a:redhat:acm:2.16::el9"]}, {"vendor": "Red Hat", "product": "Red Hat Advanced Cluster Management for Kubernetes 2.16", "collectionURL": "https://catalog.redhat.com/software/containers/", "packageName": "rhacm2/submariner-rhel9-operator", "defaultStatus": "affected", "versions": [{"version": "1790670912", "lessThan": "*", "versionType": "rpm", "status": "unaffected"}], "cpes": ["cpe:/a:redhat:acm:2.16::el9"]}, {"vendor": "Red Hat", "product": "Red Hat Advanced Cluster Management for Kubernetes 2.16", "collectionURL": "https://catalog.redhat.com/software/containers/", "packageName": "rhacm2/submariner-route-agent-rhel9", "defaultStatus": "affected", "versions": [{"version": "1790670254", "lessThan": "*", "versionType": "rpm", "status": "unaffected"}], "cpes": ["cpe:/a:redhat:acm:2.16::el9"]}, {"vendor": "Red Hat", "product": "Red Hat Advanced Cluster Management for Kubernetes 2.17", "collectionURL": "https://catalog.redhat.com/software/containers/", "packageName": "rhacm2/lighthouse-agent-rhel9", "defaultStatus": "affected", "versions": [{"version": "1788023916", "lessThan": "*", "versionType": "rpm", "status": "unaffected"}], "cpes": ["cpe:/a:redhat:acm:2.17::el9"]}, {"vendor": "Red Hat", "product": "Red Hat Advanced Cluster Management for Kubernetes 2.17", "collectionURL": "https://catalog.redhat.com/software/containers/", "packageName": "rhacm2/lighthouse-coredns-rhel9", "defaultStatus": "affected", "versions": [{"version": "1788023940", "lessThan": "*", "versionType": "rpm", "status": "unaffected"}], "cpes": ["cpe:/a:redhat:acm:2.17::el9"]}, {"vendor": "Red Hat", "product": "Red Hat Advanced Cluster Management for Kubernetes 2.17", "collectionURL": "https://catalog.redhat.com/software/containers/", "packageName": "rhacm2/subctl-rhel9", "defaultStatus": "affected", "versions": [{"version": "1788105072", "lessThan": "*", "versionType": "rpm", "status": "unaffected"}], "cpes": ["cpe:/a:redhat:acm:2.17::el9"]}, {"vendor": "Red Hat", "product": "Red Hat Advanced Cluster Management for Kubernetes 2.17", "collectionURL": "https://catalog.redhat.com/software/containers/", "packageName": "rhacm2/submariner-gateway-rhel9", "defaultStatus": "affected", "versions": [{"version": "1788043964", "lessThan": "*", "versionType": "rpm", "status": "unaffected"}], "cpes": ["cpe:/a:redhat:acm:2.17::el9"]}, {"vendor": "Red Hat", "product": "Red Hat Advanced Cluster Management for Kubernetes 2.17", "collectionURL": "https://catalog.redhat.com/software/containers/", "packageName": "rhacm2/submariner-globalnet-rhel9", "defaultStatus": "affected", "versions": [{"version": "1788043961", "lessThan": "*", "versionType": "rpm", "status": "unaffected"}], "cpes": ["cpe:/a:redhat:acm:2.17::el9"]}, {"vendor": "Red Hat", "product": "Red Hat Advanced Cluster Management for Kubernetes 2.17", "collectionURL": "https://catalog.redhat.com/software/containers/", "packageName": "rhacm2/submariner-rhel9-operator", "defaultStatus": "affected", "versions": [{"version": "1788073481", "lessThan": "*", "versionType": "rpm", "status": "unaffected"}], "cpes": ["cpe:/a:redhat:acm:2.17::el9"]}, {"vendor": "Red Hat", "product": "Red Hat Advanced Cluster Management for Kubernetes 2.17", "collectionURL": "https://catalog.redhat.com/software/containers/", "packageName": "rhacm2/submariner-route-agent-rhel9", "defaultStatus": "affected", "versions": [{"version": "1788043970", "lessThan": "*", "versionType": "rpm", "status": "unaffected"}], "cpes": ["cpe:/a:redhat:acm:2.17::el9"]}, {"vendor": "Red Hat", "product": "Red Hat Advanced Cluster Management for Kubernetes 2", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "packageName": "rhacm2/submariner-addon-rhel9", "defaultStatus": "affected", "cpes": ["cpe:/a:redhat:acm:2"]}, {"vendor": "Red Hat", "product": "Red Hat Advanced Cluster Management for Kubernetes 2", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "packageName": "rhacm2/submariner-operator-bundle", "defaultStatus": "affected", "cpes": ["cpe:/a:redhat:acm:2"]}], "references": [{"url": "https://access.redhat.com/errata/RHSA-2026:63016", "name": "RHSA-2026:63016", "tags": ["vendor-advisory", "x_refsource_REDHAT"]}, {"url": "https://access.redhat.com/errata/RHSA-2026:85227", "name": "RHSA-2026:85227", "tags": ["vendor-advisory", "x_refsource_REDHAT"]}, {"url": "https://access.redhat.com/security/cve/CVE-2026-66785", "tags": ["vdb-entry", "x_refsource_REDHAT"]}, {"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2507530", "name": "RHBZ#2507530", "tags": ["issue-tracking", "x_refsource_REDHAT"]}], "datePublic": "2026-08-20T17:20:00.000Z", "problemTypes": [{"descriptions": [{"cweId": "CWE-345", "description": "Insufficient Verification of Data Authenticity", "lang": "en", "type": "CWE"}]}], "x_redhatCweChain": "CWE-345: Insufficient Verification of Data Authenticity", "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."}], "timeline": [{"lang": "en", "time": "2026-07-27T00:00:00.000Z", "value": "Reported to Red Hat."}, {"lang": "en", "time": "2026-08-20T17:20:00.000Z", "value": "Made public."}], "providerMetadata": {"orgId": "53f830b8-0a3f-465b-8143-3b8a9948e749", "shortName": "redhat", "dateUpdated": "2026-10-19T17:30:24.677Z"}, "x_generator": {"engine": "cvelib 1.8.0"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-08-25T15:16:29.726764Z", "id": "CVE-2026-66785", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-08-25T15:16:41.989Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-66785", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "version": "2.0.3", "timestamp": "2026-08-25T15:16:29.726764Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-08-25T15:16:37.066Z"}}], "cna": {"title": "Submariner: submariner: missing validation of remote endpoint subnets and clusterid enables cross-cluster traffic hijack", "metrics": [{"other": {"type": "Red Hat severity rating", "content": {"value": "Moderate", "namespace": "https://access.redhat.com/security/updates/classification/"}}}, {"format": "CVSS", "cvssV3_1": {"scope": "CHANGED", "version": "3.1", "baseScore": 8.7, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:N", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "HIGH", "confidentialityImpact": "HIGH"}}], "affected": [{"cpes": ["cpe:/a:redhat:acm:2.16::el9"], "vendor": "Red Hat", "product": "Red Hat Advanced Cluster Management for Kubernetes 2.16", "versions": [{"status": "unaffected", "version": "1790670439", "lessThan": "*", "versionType": "rpm"}], "packageName": "rhacm2/lighthouse-agent-rhel9", "collectionURL": "https://catalog.redhat.com/software/containers/", "defaultStatus": "affected"}, {"cpes": ["cpe:/a:redhat:acm:2.16::el9"], "vendor": "Red Hat", "product": "Red Hat Advanced Cluster Management for Kubernetes 2.16", "versions": [{"status": "unaffected", "version": "1790670231", "lessThan": "*", "versionType": "rpm"}], "packageName": "rhacm2/lighthouse-coredns-rhel9", "collectionURL": "https://catalog.redhat.com/software/containers/", "defaultStatus": "affected"}, {"cpes": ["cpe:/a:redhat:acm:2.16::el9"], "vendor": "Red Hat", "product": "Red Hat Advanced Cluster Management for Kubernetes 2.16", "versions": [{"status": "unaffected", "version": "1790670243", "lessThan": "*", "versionType": "rpm"}], "packageName": "rhacm2/subctl-rhel9", "collectionURL": "https://catalog.redhat.com/software/containers/", "defaultStatus": "affected"}, {"cpes": ["cpe:/a:redhat:acm:2.16::el9"], "vendor": "Red Hat", "product": "Red Hat Advanced Cluster Management for Kubernetes 2.16", "versions": [{"status": "unaffected", "version": "1790670508", "lessThan": "*", "versionType": "rpm"}], "packageName": "rhacm2/submariner-gateway-rhel9", "collectionURL": "https://catalog.redhat.com/software/containers/", "defaultStatus": "affected"}, {"cpes": ["cpe:/a:redhat:acm:2.16::el9"], "vendor": "Red Hat", "product": "Red Hat Advanced Cluster Management for Kubernetes 2.16", "versions": [{"status": "unaffected", "version": "1790670233", "lessThan": "*", "versionType": "rpm"}], "packageName": "rhacm2/submariner-globalnet-rhel9", "collectionURL": "https://catalog.redhat.com/software/containers/", "defaultStatus": "affected"}, {"cpes": ["cpe:/a:redhat:acm:2.16::el9"], "vendor": "Red Hat", "product": "Red Hat Advanced Cluster Management for Kubernetes 2.16", "versions": [{"status": "unaffected", "version": "1790670912", "lessThan": "*", "versionType": "rpm"}], "packageName": "rhacm2/submariner-rhel9-operator", "collectionURL": "https://catalog.redhat.com/software/containers/", "defaultStatus": "affected"}, {"cpes": ["cpe:/a:redhat:acm:2.16::el9"], "vendor": "Red Hat", "product": "Red Hat Advanced Cluster Management for Kubernetes 2.16", "versions": [{"status": "unaffected", "version": "1790670254", "lessThan": "*", "versionType": "rpm"}], "packageName": "rhacm2/submariner-route-agent-rhel9", "collectionURL": "https://catalog.redhat.com/software/containers/", "defaultStatus": "affected"}, {"cpes": ["cpe:/a:redhat:acm:2.17::el9"], "vendor": "Red Hat", "product": "Red Hat Advanced Cluster Management for Kubernetes 2.17", "versions": [{"status": "unaffected", "version": "1788023916", "lessThan": "*", "versionType": "rpm"}], "packageName": "rhacm2/lighthouse-agent-rhel9", "collectionURL": "https://catalog.redhat.com/software/containers/", "defaultStatus": "affected"}, {"cpes": ["cpe:/a:redhat:acm:2.17::el9"], "vendor": "Red Hat", "product": "Red Hat Advanced Cluster Management for Kubernetes 2.17", "versions": [{"status": "unaffected", "version": "1788023940", "lessThan": "*", "versionType": "rpm"}], "packageName": "rhacm2/lighthouse-coredns-rhel9", "collectionURL": "https://catalog.redhat.com/software/containers/", "defaultStatus": "affected"}, {"cpes": ["cpe:/a:redhat:acm:2.17::el9"], "vendor": "Red Hat", "product": "Red Hat Advanced Cluster Management for Kubernetes 2.17", "versions": [{"status": "unaffected", "version": "1788105072", "lessThan": "*", "versionType": "rpm"}], "packageName": "rhacm2/subctl-rhel9", "collectionURL": "https://catalog.redhat.com/software/containers/", "defaultStatus": "affected"}, {"cpes": ["cpe:/a:redhat:acm:2.17::el9"], "vendor": "Red Hat", "product": "Red Hat Advanced Cluster Management for Kubernetes 2.17", "versions": [{"status": "unaffected", "version": "1788043964", "lessThan": "*", "versionType": "rpm"}], "packageName": "rhacm2/submariner-gateway-rhel9", "collectionURL": "https://catalog.redhat.com/software/containers/", "defaultStatus": "affected"}, {"cpes": ["cpe:/a:redhat:acm:2.17::el9"], "vendor": "Red Hat", "product": "Red Hat Advanced Cluster Management for Kubernetes 2.17", "versions": [{"status": "unaffected", "version": "1788043961", "lessThan": "*", "versionType": "rpm"}], "packageName": "rhacm2/submariner-globalnet-rhel9", "collectionURL": "https://catalog.redhat.com/software/containers/", "defaultStatus": "affected"}, {"cpes": ["cpe:/a:redhat:acm:2.17::el9"], "vendor": "Red Hat", "product": "Red Hat Advanced Cluster Management for Kubernetes 2.17", "versions": [{"status": "unaffected", "version": "1788073481", "lessThan": "*", "versionType": "rpm"}], "packageName": "rhacm2/submariner-rhel9-operator", "collectionURL": "https://catalog.redhat.com/software/containers/", "defaultStatus": "affected"}, {"cpes": ["cpe:/a:redhat:acm:2.17::el9"], "vendor": "Red Hat", "product": "Red Hat Advanced Cluster Management for Kubernetes 2.17", "versions": [{"status": "unaffected", "version": "1788043970", "lessThan": "*", "versionType": "rpm"}], "packageName": "rhacm2/submariner-route-agent-rhel9", "collectionURL": "https://catalog.redhat.com/software/containers/", "defaultStatus": "affected"}, {"cpes": ["cpe:/a:redhat:acm:2"], "vendor": "Red Hat", "product": "Red Hat Advanced Cluster Management for Kubernetes 2", "packageName": "rhacm2/submariner-addon-rhel9", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "defaultStatus": "affected"}, {"cpes": ["cpe:/a:redhat:acm:2"], "vendor": "Red Hat", "product": "Red Hat Advanced Cluster Management for Kubernetes 2", "packageName": "rhacm2/submariner-operator-bundle", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "defaultStatus": "affected"}], "timeline": [{"lang": "en", "time": "2026-07-27T00:00:00.000Z", "value": "Reported to Red Hat."}, {"lang": "en", "time": "2026-08-20T17:20:00.000Z", "value": "Made public."}], "datePublic": "2026-08-20T17:20:00.000Z", "references": [{"url": "https://access.redhat.com/errata/RHSA-2026:63016", "name": "RHSA-2026:63016", "tags": ["vendor-advisory", "x_refsource_REDHAT"]}, {"url": "https://access.redhat.com/errata/RHSA-2026:85227", "name": "RHSA-2026:85227", "tags": ["vendor-advisory", "x_refsource_REDHAT"]}, {"url": "https://access.redhat.com/security/cve/CVE-2026-66785", "tags": ["vdb-entry", "x_refsource_REDHAT"]}, {"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2507530", "name": "RHBZ#2507530", "tags": ["issue-tracking", "x_refsource_REDHAT"]}], "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_generator": {"engine": "cvelib 1.8.0"}, "descriptions": [{"lang": "en", "value": "A flaw was found in Submariner. This vulnerability allows a malicious cluster (spoke) to redirect network traffic from other connected clusters (peer clusters) by publishing a specially crafted network endpoint. The system fails to properly validate the network subnets provided by the malicious cluster, enabling it to declare arbitrary network ranges. Consequently, all network traffic intended for these arbitrary ranges from peer clusters will be rerouted through the attacker's tunnel, potentially leading to unauthorized information disclosure or network disruption."}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-345", "description": "Insufficient Verification of Data Authenticity"}]}], "providerMetadata": {"orgId": "53f830b8-0a3f-465b-8143-3b8a9948e749", "shortName": "redhat", "dateUpdated": "2026-10-19T17:30:24.677Z"}, "x_redhatCweChain": "CWE-345: Insufficient Verification of Data Authenticity"}}, "cveMetadata": {"cveId": "CVE-2026-66785", "state": "PUBLISHED", "dateUpdated": "2026-10-19T17:30:24.677Z", "dateReserved": "2026-07-27T17:51:24.885Z", "assignerOrgId": "53f830b8-0a3f-465b-8143-3b8a9948e749", "datePublished": "2026-08-20T18:15:06.802Z", "assignerShortName": "redhat"}, "dataVersion": "5.2"}

{"affected": [{"affectedData": [{"collectionURL": "https://catalog.redhat.com/software/containers/", "cpes": ["cpe:/a:redhat:acm:2.16::el9"], "defaultStatus": "affected", "packageName": "rhacm2/lighthouse-agent-rhel9", "product": "Red Hat Advanced Cluster Management for Kubernetes 2.16", "vendor": "Red Hat", "versions": [{"lessThan": "*", "status": "unaffected", "version": "1790670439", "versionType": "rpm"}]}, {"collectionURL": "https://catalog.redhat.com/software/containers/", "cpes": ["cpe:/a:redhat:acm:2.16::el9"], "defaultStatus": "affected", "packageName": "rhacm2/lighthouse-coredns-rhel9", "product": "Red Hat Advanced Cluster Management for Kubernetes 2.16", "vendor": "Red Hat", "versions": [{"lessThan": "*", "status": "unaffected", "version": "1790670231", "versionType": "rpm"}]}, {"collectionURL": "https://catalog.redhat.com/software/containers/", "cpes": ["cpe:/a:redhat:acm:2.16::el9"], "defaultStatus": "affected", "packageName": "rhacm2/subctl-rhel9", "product": "Red Hat Advanced Cluster Management for Kubernetes 2.16", "vendor": "Red Hat", "versions": [{"lessThan": "*", "status": "unaffected", "version": "1790670243", "versionType": "rpm"}]}, {"collectionURL": "https://catalog.redhat.com/software/containers/", "cpes": ["cpe:/a:redhat:acm:2.16::el9"], "defaultStatus": "affected", "packageName": "rhacm2/submariner-gateway-rhel9", "product": "Red Hat Advanced Cluster Management for Kubernetes 2.16", "vendor": "Red Hat", "versions": [{"lessThan": "*", "status": "unaffected", "version": "1790670508", "versionType": "rpm"}]}, {"collectionURL": "https://catalog.redhat.com/software/containers/", "cpes": ["cpe:/a:redhat:acm:2.16::el9"], "defaultStatus": "affected", "packageName": "rhacm2/submariner-globalnet-rhel9", "product": "Red Hat Advanced Cluster Management for Kubernetes 2.16", "vendor": "Red Hat", "versions": [{"lessThan": "*", "status": "unaffected", "version": "1790670233", "versionType": "rpm"}]}, {"collectionURL": "https://catalog.redhat.com/software/containers/", "cpes": ["cpe:/a:redhat:acm:2.16::el9"], "defaultStatus": "affected", "packageName": "rhacm2/submariner-rhel9-operator", "product": "Red Hat Advanced Cluster Management for Kubernetes 2.16", "vendor": "Red Hat", "versions": [{"lessThan": "*", "status": "unaffected", "version": "1790670912", "versionType": "rpm"}]}, {"collectionURL": "https://catalog.redhat.com/software/containers/", "cpes": ["cpe:/a:redhat:acm:2.16::el9"], "defaultStatus": "affected", "packageName": "rhacm2/submariner-route-agent-rhel9", "product": "Red Hat Advanced Cluster Management for Kubernetes 2.16", "vendor": "Red Hat", "versions": [{"lessThan": "*", "status": "unaffected", "version": "1790670254", "versionType": "rpm"}]}, {"collectionURL": "https://catalog.redhat.com/software/containers/", "cpes": ["cpe:/a:redhat:acm:2.17::el9"], "defaultStatus": "affected", "packageName": "rhacm2/lighthouse-agent-rhel9", "product": "Red Hat Advanced Cluster Management for Kubernetes 2.17", "vendor": "Red Hat", "versions": [{"lessThan": "*", "status": "unaffected", "version": "1788023916", "versionType": "rpm"}]}, {"collectionURL": "https://catalog.redhat.com/software/containers/", "cpes": ["cpe:/a:redhat:acm:2.17::el9"], "defaultStatus": "affected", "packageName": "rhacm2/lighthouse-coredns-rhel9", "product": "Red Hat Advanced Cluster Management for Kubernetes 2.17", "vendor": "Red Hat", "versions": [{"lessThan": "*", "status": "unaffected", "version": "1788023940", "versionType": "rpm"}]}, {"collectionURL": "https://catalog.redhat.com/software/containers/", "cpes": ["cpe:/a:redhat:acm:2.17::el9"], "defaultStatus": "affected", "packageName": "rhacm2/subctl-rhel9", "product": "Red Hat Advanced Cluster Management for Kubernetes 2.17", "vendor": "Red Hat", "versions": [{"lessThan": "*", "status": "unaffected", "version": "1788105072", "versionType": "rpm"}]}, {"collectionURL": "https://catalog.redhat.com/software/containers/", "cpes": ["cpe:/a:redhat:acm:2.17::el9"], "defaultStatus": "affected", "packageName": "rhacm2/submariner-gateway-rhel9", "product": "Red Hat Advanced Cluster Management for Kubernetes 2.17", "vendor": "Red Hat", "versions": [{"lessThan": "*", "status": "unaffected", "version": "1788043964", "versionType": "rpm"}]}, {"collectionURL": "https://catalog.redhat.com/software/containers/", "cpes": ["cpe:/a:redhat:acm:2.17::el9"], "defaultStatus": "affected", "packageName": "rhacm2/submariner-globalnet-rhel9", "product": "Red Hat Advanced Cluster Management for Kubernetes 2.17", "vendor": "Red Hat", "versions": [{"lessThan": "*", "status": "unaffected", "version": "1788043961", "versionType": "rpm"}]}, {"collectionURL": "https://catalog.redhat.com/software/containers/", "cpes": ["cpe:/a:redhat:acm:2.17::el9"], "defaultStatus": "affected", "packageName": "rhacm2/submariner-rhel9-operator", "product": "Red Hat Advanced Cluster Management for Kubernetes 2.17", "vendor": "Red Hat", "versions": [{"lessThan": "*", "status": "unaffected", "version": "1788073481", "versionType": "rpm"}]}, {"collectionURL": "https://catalog.redhat.com/software/containers/", "cpes": ["cpe:/a:redhat:acm:2.17::el9"], "defaultStatus": "affected", "packageName": "rhacm2/submariner-route-agent-rhel9", "product": "Red Hat Advanced Cluster Management for Kubernetes 2.17", "vendor": "Red Hat", "versions": [{"lessThan": "*", "status": "unaffected", "version": "1788043970", "versionType": "rpm"}]}, {"collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "cpes": ["cpe:/a:redhat:acm:2"], "defaultStatus": "affected", "packageName": "rhacm2/submariner-addon-rhel9", "product": "Red Hat Advanced Cluster Management for Kubernetes 2", "vendor": "Red Hat"}, {"collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "cpes": ["cpe:/a:redhat:acm:2"], "defaultStatus": "affected", "packageName": "rhacm2/submariner-operator-bundle", "product": "Red Hat Advanced Cluster Management for Kubernetes 2", "vendor": "Red Hat"}], "source": "secalert@redhat.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "A flaw was found in Submariner. This vulnerability allows a malicious cluster (spoke) to redirect network traffic from other connected clusters (peer clusters) by publishing a specially crafted network endpoint. The system fails to properly validate the network subnets provided by the malicious cluster, enabling it to declare arbitrary network ranges. Consequently, all network traffic intended for these arbitrary ranges from peer clusters will be rerouted through the attacker's tunnel, potentially leading to unauthorized information disclosure or network disruption."}, {"lang": "es", "value": "Se encontr\u00f3 un fallo en Submariner. Esta vulnerabilidad permite a un cl\u00faster malicioso (spoke) redirigir el tr\u00e1fico de red de otros cl\u00fasteres conectados (cl\u00fasteres pares) al publicar un punto final de red especialmente dise\u00f1ado. El sistema no valida correctamente las subredes de red proporcionadas por el cl\u00faster malicioso, lo que le permite declarar rangos de red arbitrarios. En consecuencia, todo el tr\u00e1fico de red destinado a estos rangos arbitrarios desde los cl\u00fasteres pares ser\u00e1 redirigido a trav\u00e9s del t\u00fanel del atacante, lo que podr\u00eda llevar a una revelaci\u00f3n de informaci\u00f3n no autorizada o a una interrupci\u00f3n de la red."}], "id": "CVE-2026-66785", "lastModified": "2026-10-19T18:17:08.157", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 8.7, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "HIGH", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:N", "version": "3.1"}, "exploitabilityScore": 2.3, "impactScore": 5.8, "source": "secalert@redhat.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-66785", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-08-25T15:16:29.726764Z", "version": "2.0.3"}}]}, "published": "2026-08-20T19:16:58.463", "references": [{"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2026:63016"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2026:85227"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/security/cve/CVE-2026-66785"}, {"source": "secalert@redhat.com", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2507530"}], "sourceIdentifier": "secalert@redhat.com", "vulnStatus": "Awaiting Analysis", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-345"}], "source": "secalert@redhat.com", "type": "Secondary"}]}

{"bugzilla": {"description": "submariner: submariner: unvalidated Endpoint.Spec.Subnets propagated into WireGuard AllowedIPs / IPsec enables traffic hijack", "id": "2507530", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2507530"}, "csaw": false, "cvss3": {"cvss3_base_score": "9.9", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-20", "details": ["A flaw was found in Submariner. This vulnerability allows a malicious cluster (spoke) to redirect network traffic from other connected clusters (peer clusters) by publishing a specially crafted network endpoint. The system fails to properly validate the network subnets provided by the malicious cluster, enabling it to declare arbitrary network ranges. Consequently, all network traffic intended for these arbitrary ranges from peer clusters will be rerouted through the attacker's tunnel, potentially leading to unauthorized information disclosure or network disruption."], "mitigation": {"lang": "en:us", "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."}, "name": "CVE-2026-66785", "package_state": [{"cpe": "cpe:/a:redhat:acm:2", "fix_state": "Affected", "package_name": "rhacm2/lighthouse-agent-rhel9", "product_name": "Red Hat Advanced Cluster Management for Kubernetes 2"}, {"cpe": "cpe:/a:redhat:acm:2", "fix_state": "Affected", "package_name": "rhacm2/lighthouse-coredns-rhel9", "product_name": "Red Hat Advanced Cluster Management for Kubernetes 2"}, {"cpe": "cpe:/a:redhat:acm:2", "fix_state": "Affected", "package_name": "rhacm2/subctl-rhel9", "product_name": "Red Hat Advanced Cluster Management for Kubernetes 2"}, {"cpe": "cpe:/a:redhat:acm:2", "fix_state": "Affected", "package_name": "rhacm2/submariner-addon-rhel9", "product_name": "Red Hat Advanced Cluster Management for Kubernetes 2"}, {"cpe": "cpe:/a:redhat:acm:2", "fix_state": "Affected", "package_name": "rhacm2/submariner-gateway-rhel9", "product_name": "Red Hat Advanced Cluster Management for Kubernetes 2"}, {"cpe": "cpe:/a:redhat:acm:2", "fix_state": "Affected", "package_name": "rhacm2/submariner-globalnet-rhel9", "product_name": "Red Hat Advanced Cluster Management for Kubernetes 2"}, {"cpe": "cpe:/a:redhat:acm:2", "fix_state": "Affected", "package_name": "rhacm2/submariner-operator-bundle", "product_name": "Red Hat Advanced Cluster Management for Kubernetes 2"}, {"cpe": "cpe:/a:redhat:acm:2", "fix_state": "Affected", "package_name": "rhacm2/submariner-rhel9-operator", "product_name": "Red Hat Advanced Cluster Management for Kubernetes 2"}, {"cpe": "cpe:/a:redhat:acm:2", "fix_state": "Affected", "package_name": "rhacm2/submariner-route-agent-rhel9", "product_name": "Red Hat Advanced Cluster Management for Kubernetes 2"}], "public_date": "2026-08-20T17:20:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-66785\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-66785"], "statement": "This is an Important vulnerability in Red Hat Advanced Cluster Management for Kubernetes. A malicious spoke cluster can exploit unvalidated Submariner Endpoint configurations to inject arbitrary network routes, potentially hijacking traffic from other connected clusters. This could lead to unauthorized data interception or redirection within the multi-cluster environment.", "threat_severity": "Important"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": null}], "enrichment": {"confidence": 90.0, "confidence_source": "matching", "scores": [{"score": 90.0, "source": "matching"}]}, "original": {"product": "Red Hat Advanced Cluster Management for Kubernetes 2", "source": "cna", "vendor": "Red Hat"}, "product": "advanced_cluster_management_for_kubernetes", "vendor": "redhat"}], "created": "2026-08-21T01:45:08.040055+00:00", "updated": "2026-10-17T10:00:08.624152+00:00", "vendors": ["redhat", "redhat$PRODUCT$advanced_cluster_management_for_kubernetes"]}