{"id":"CVE-2026-66780","title":"A flaw was found in the submariner-operator component","summary":"A flaw was found in the submariner-operator component. The `submariner-k8s-broker-cluster` Role, which is assigned to joined clusters, possesses excessive permissions. This allows a compromised cluster to alter network configurations, sp…","severity":"medium","cvss":6.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","cwe":["CWE-532"],"vendor":"Red Hat","product":"rhacm2/submariner-addon-rhel9","affected":["rhacm2/submariner-addon-rhel9 (all versions)","rhacm2/submariner-addon-rhel9 (all versions)","rhacm2/submariner-addon-rhel9 (all versions)","rhacm2/submariner-addon-rhel9 (all versions)","rhacm2/submariner-addon-rhel9 (all versions)","rhacm2/subctl-rhel9 (all versions)","rhacm2/submariner-rhel9-operator (all versions)","rhacm2/submariner-addon-rhel9 (all versions)","rhacm2/submariner-operator-bundle (all versions)"],"published":"2026-08-18","updated":"2026-09-21","sourceUpdated":"2026-09-21T12:17:16.303","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-66780","references":[{"url":"https://access.redhat.com/errata/RHSA-2026:63016","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:67538","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:67539","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:67540","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:67541","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:67542","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:67543","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/security/cve/CVE-2026-66780","label":"secalert@redhat.com"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2507524","label":"secalert@redhat.com"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-66780.json"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-66780"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-66780"}],"tags":["nvd","cve.org","csaf","vex","red-hat"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"total","timestamp":"2026-08-18T18:44:52.061095Z"},"epss":0.0032,"epssPercentile":0.25184,"ingestedAt":"2026-09-21T11:35:54.436Z","patched":["advanced_cluster_management_for_kubernetes 2.11","advanced_cluster_management_for_kubernetes 2.13","advanced_cluster_management_for_kubernetes 2.14","advanced_cluster_management_for_kubernetes 2.15","advanced_cluster_management_for_kubernetes 2.16","advanced_cluster_management_for_kubernetes 2.17"],"slug":"CVE-2026-66780","body":"## Overview\n\nA flaw was found in the submariner-operator component. The `submariner-k8s-broker-cluster` Role, which is assigned to joined clusters, possesses excessive permissions. This allows a compromised cluster to alter network configurations, specifically by overwriting other clusters' endpoint information. Consequently, an attacker can redirect inter-cluster tunnel traffic, enabling a Man-in-the-Middle (MITM) attack across the entire cluster mesh.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **RHSA-2026:67538** · Red Hat · fixed in: Red Hat Advanced Cluster Management for Kubernetes 2.11 · released 2026-09-15 · [advisory](https://access.redhat.com/errata/RHSA-2026:67538)\n- **RHSA-2026:67540** · Red Hat · fixed in: Red Hat Advanced Cluster Management for Kubernetes 2.13 · released 2026-09-15 · [advisory](https://access.redhat.com/errata/RHSA-2026:67540)\n- **RHSA-2026:67539** · Red Hat · fixed in: Red Hat Advanced Cluster Management for Kubernetes 2.14 · released 2026-09-15 · [advisory](https://access.redhat.com/errata/RHSA-2026:67539)\n- **RHSA-2026:67541** · Red Hat · fixed in: Red Hat Advanced Cluster Management for Kubernetes 2.15 · released 2026-09-15 · [advisory](https://access.redhat.com/errata/RHSA-2026:67541)\n- **RHSA-2026:67542** · Red Hat · fixed in: Red Hat Advanced Cluster Management for Kubernetes 2.16 · released 2026-09-15 · [advisory](https://access.redhat.com/errata/RHSA-2026:67542)\n- **RHSA-2026:63016** · Red Hat · fixed in: Red Hat Advanced Cluster Management for Kubernetes 2.17 · released 2026-09-03 · [advisory](https://access.redhat.com/errata/RHSA-2026:63016)\n- **RHSA-2026:67543** · Red Hat · fixed in: Red Hat Advanced Cluster Management for Kubernetes 2.17 · released 2026-09-15 · [advisory](https://access.redhat.com/errata/RHSA-2026:67543)\n- **Red Hat VEX** · Important · affected: Red Hat Advanced Cluster Management for Kubernetes 2 · no fix planned: Red Hat Advanced Cluster Management for Kubernetes 2 · updated 2026-09-21 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-66780.json)","depth":"sunlit","depthScore":36,"depthScoreParts":{"impact":35.8,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}