{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-66788", "assignerOrgId": "53f830b8-0a3f-465b-8143-3b8a9948e749", "state": "PUBLISHED", "assignerShortName": "redhat", "dateReserved": "2026-07-27T17:51:24.885Z", "datePublished": "2026-08-20T18:15:37.408Z", "dateUpdated": "2026-08-20T18:52:30.583Z"}, "containers": {"cna": {"title": "Lighthouse: lighthouse: arbitrary local-namespace injection via attacker-controlled labelsourcenamespace", "metrics": [{"other": {"content": {"value": "Important", "namespace": "https://access.redhat.com/security/updates/classification/"}, "type": "Red Hat severity rating"}}, {"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 9.9, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H", "version": "3.1"}, "format": "CVSS"}], "descriptions": [{"lang": "en", "value": "A flaw was found in Lighthouse. A remote attacker, by compromising a spoke cluster, can exploit a vulnerability where the destination namespace for resource injection is derived from an attacker-controlled label or annotation on the broker object. This allows the attacker to inject unauthorized EndpointSlices and ServiceImports into any namespace on peer clusters, including critical system namespaces like kube-system and openshift-*. This could lead to privilege escalation or other forms of system compromise within the cluster."}], "affected": [{"vendor": "Red Hat", "product": "Red Hat Advanced Cluster Management for Kubernetes 2", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "packageName": "rhacm2/lighthouse-agent-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/lighthouse-coredns-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/subctl-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-rhel9-operator", "defaultStatus": "affected", "cpes": ["cpe:/a:redhat:acm:2"]}], "references": [{"url": "https://access.redhat.com/security/cve/CVE-2026-66788", "tags": ["vdb-entry", "x_refsource_REDHAT"]}, {"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2507533", "name": "RHBZ#2507533", "tags": ["issue-tracking", "x_refsource_REDHAT"]}], "datePublic": "2026-08-20T17:20:00.000Z", "problemTypes": [{"descriptions": [{"cweId": "CWE-284", "description": "Improper Access Control", "lang": "en", "type": "CWE"}]}], "x_redhatCweChain": "CWE-284: Improper Access Control", "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": "2026-08-20T18:15:37.408Z"}, "x_generator": {"engine": "cvelib 1.8.0"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-08-20T18:52:23.727449Z", "id": "CVE-2026-66788", "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": "2026-08-20T18:52:30.583Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-66788", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "version": "2.0.3", "timestamp": "2026-08-20T18:52:23.727449Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-08-20T18:52:27.248Z"}}], "cna": {"title": "Lighthouse: lighthouse: arbitrary local-namespace injection via attacker-controlled labelsourcenamespace", "metrics": [{"other": {"type": "Red Hat severity rating", "content": {"value": "Important", "namespace": "https://access.redhat.com/security/updates/classification/"}}}, {"format": "CVSS", "cvssV3_1": {"scope": "CHANGED", "version": "3.1", "baseScore": 9.9, "attackVector": "NETWORK", "baseSeverity": "CRITICAL", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}}], "affected": [{"cpes": ["cpe:/a:redhat:acm:2"], "vendor": "Red Hat", "product": "Red Hat Advanced Cluster Management for Kubernetes 2", "packageName": "rhacm2/lighthouse-agent-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/lighthouse-coredns-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/subctl-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-rhel9-operator", "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/security/cve/CVE-2026-66788", "tags": ["vdb-entry", "x_refsource_REDHAT"]}, {"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2507533", "name": "RHBZ#2507533", "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 Lighthouse. A remote attacker, by compromising a spoke cluster, can exploit a vulnerability where the destination namespace for resource injection is derived from an attacker-controlled label or annotation on the broker object. This allows the attacker to inject unauthorized EndpointSlices and ServiceImports into any namespace on peer clusters, including critical system namespaces like kube-system and openshift-*. This could lead to privilege escalation or other forms of system compromise within the cluster."}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-284", "description": "Improper Access Control"}]}], "providerMetadata": {"orgId": "53f830b8-0a3f-465b-8143-3b8a9948e749", "shortName": "redhat", "dateUpdated": "2026-08-20T18:15:37.408Z"}, "x_redhatCweChain": "CWE-284: Improper Access Control"}}, "cveMetadata": {"cveId": "CVE-2026-66788", "state": "PUBLISHED", "dateUpdated": "2026-08-20T18:52:30.583Z", "dateReserved": "2026-07-27T17:51:24.885Z", "assignerOrgId": "53f830b8-0a3f-465b-8143-3b8a9948e749", "datePublished": "2026-08-20T18:15:37.408Z", "assignerShortName": "redhat"}, "dataVersion": "5.2"}

{"affected": [{"affectedData": [{"collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "cpes": ["cpe:/a:redhat:acm:2"], "defaultStatus": "affected", "packageName": "rhacm2/lighthouse-agent-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/lighthouse-coredns-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/subctl-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-rhel9-operator", "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 Lighthouse. A remote attacker, by compromising a spoke cluster, can exploit a vulnerability where the destination namespace for resource injection is derived from an attacker-controlled label or annotation on the broker object. This allows the attacker to inject unauthorized EndpointSlices and ServiceImports into any namespace on peer clusters, including critical system namespaces like kube-system and openshift-*. This could lead to privilege escalation or other forms of system compromise within the cluster."}], "id": "CVE-2026-66788", "lastModified": "2026-08-20T19:16:58.823", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 9.9, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 3.1, "impactScore": 6.0, "source": "secalert@redhat.com", "type": "Primary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-66788", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-08-20T18:52:23.727449Z", "version": "2.0.3"}}]}, "published": "2026-08-20T19:16:58.823", "references": [{"source": "secalert@redhat.com", "url": "https://access.redhat.com/security/cve/CVE-2026-66788"}, {"source": "secalert@redhat.com", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2507533"}], "sourceIdentifier": "secalert@redhat.com", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-284"}], "source": "secalert@redhat.com", "type": "Primary"}]}

{"bugzilla": {"description": "lighthouse: lighthouse: arbitrary local-namespace injection via attacker-controlled LabelSourceNamespace", "id": "2507533", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2507533"}, "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-284", "details": ["A flaw was found in Lighthouse. A remote attacker, by compromising a spoke cluster, can exploit a vulnerability where the destination namespace for resource injection is derived from an attacker-controlled label or annotation on the broker object. This allows the attacker to inject unauthorized EndpointSlices and ServiceImports into any namespace on peer clusters, including critical system namespaces like kube-system and openshift-*. This could lead to privilege escalation or other forms of system compromise within the cluster."], "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-2026-66788", "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-rhel9-operator", "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-2026-66788\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-66788"], "statement": "Important: This flaw in Red Hat Advanced Cluster Management for Kubernetes allows a compromised spoke cluster to inject EndpointSlices and ServiceImports into arbitrary namespaces on peer clusters, including critical system namespaces. The `lighthouse-agent` service account uses an attacker-controlled label for the destination namespace without validation, enabling potential privilege escalation or service disruption across the cluster federation.", "threat_severity": "Important"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": null}], "enrichment": {"confidence": 95.0, "confidence_source": "inferred", "scores": [{"score": 95.0, "source": "inferred"}, {"score": 97.0, "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": "2026-08-21T02:15:04.423970+00:00", "updated": "2026-08-21T13:00:55.322689+00:00", "vendors": ["redhat", "redhat$PRODUCT$advanced_cluster_management_for_kubernetes"]}