CVE-2026-66787

{"id": "CVE-2026-66787", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-66787", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "version": "2.0.3", "timestamp": "2026-08-20T18:51:33.566517Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "secalert@redhat.com", "cvssData": {"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"}, "impactScore": 5.8, "exploitabilityScore": 2.3}]}, "affected": [{"source": "secalert@redhat.com", "affectedData": [{"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": "1790670912", "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": "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": "1788073481", "lessThan": "*", "versionType": "rpm"}], "packageName": "rhacm2/submariner-rhel9-operator", "collectionURL": "https://catalog.redhat.com/software/containers/", "defaultStatus": "affected"}]}], "published": "2026-08-20T19:16:58.637", "references": [{"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-2026-66787", "source": "secalert@redhat.com"}, {"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2507532", "source": "secalert@redhat.com"}], "vulnStatus": "Awaiting Analysis", "weaknesses": [{"type": "Secondary", "source": "secalert@redhat.com", "description": [{"lang": "en", "value": "CWE-345"}]}], "descriptions": [{"lang": "en", "value": "A flaw was found in the lighthouse component of Red Hat Advanced Cluster Management for Kubernetes. This vulnerability stems from insufficient validation of advertised IP addresses within EndpointSlice objects. A compromised spoke cluster can exploit this by creating EndpointSlices with attacker-controlled IP addresses, causing other clusters' lighthouse DNS to redirect legitimate service traffic to malicious endpoints. This enables a remote attacker to conduct transparent Man-in-the-Middle (MITM) attacks on cross-cluster service communications, potentially leading to unauthorized information disclosure and data manipulation."}, {"lang": "es", "value": "Se encontr\u00f3 una falla en el componente lighthouse de Red Hat Advanced Cluster Management para Kubernetes. Esta vulnerabilidad se origina en la validaci\u00f3n insuficiente de las direcciones IP anunciadas dentro de los objetos EndpointSlice. Un cl\u00faster spoke comprometido puede explotar esto creando EndpointSlices con direcciones IP controladas por el atacante, haciendo que el DNS lighthouse de otros cl\u00fasteres redirija el tr\u00e1fico de servicio leg\u00edtimo a puntos finales maliciosos. Esto permite a un atacante remoto realizar ataques transparentes de Man-in-the-Middle (MitM) en comunicaciones de servicio entre cl\u00fasteres, lo que podr\u00eda llevar a la revelaci\u00f3n de informaci\u00f3n no autorizada y manipulaci\u00f3n de datos."}], "lastModified": "2026-10-19T17:17:21.453", "sourceIdentifier": "secalert@redhat.com"}