{"id":"CVE-2026-71577","title":"A flaw was found in multicluster-global-hub","summary":"A flaw was found in multicluster-global-hub. During a ManagedClusterMigration, the system incorrectly grants all managed hubs read access to a shared communication topic. This allows a compromised managed hub to intercept and collect sen…","severity":"medium","cvss":6.3,"cvssVector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N","cwe":["CWE-522"],"vendor":"Red Hat","product":"multicluster-globalhub/multicluster-globalhub-rhel9-operator","affected":["multicluster-globalhub/multicluster-globalhub-rhel9-operator (all versions)","multicluster-globalhub/multicluster-globalhub-rhel9-operator (all versions)","multicluster-globalhub/multicluster-globalhub-rhel9-operator (all versions)","multicluster-globalhub/multicluster-globalhub-rhel9-operator (all versions)"],"patched":["multicluster_global_hub 1.4.9","multicluster_global_hub 1.7.3","multicluster_global_hub 1.8.2"],"published":"2026-08-10","updated":"2026-09-24","sourceUpdated":"2026-09-24T18:18:31.503","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-71577","references":[{"url":"https://access.redhat.com/errata/RHSA-2026:67516","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:67842","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:68515","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:71597","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/security/cve/CVE-2026-71577","label":"secalert@redhat.com"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2512514","label":"secalert@redhat.com"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-71577.json"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-71577"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-71577"}],"tags":["nvd","cve.org","csaf","vex","red-hat"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-08-11T01:59:24.928197Z"},"epss":0.00369,"epssPercentile":0.28022,"ingestedAt":"2026-09-21T11:35:54.433Z","slug":"CVE-2026-71577","body":"## Overview\n\nA flaw was found in multicluster-global-hub. During a ManagedClusterMigration, the system incorrectly grants all managed hubs read access to a shared communication topic. This allows a compromised managed hub to intercept and collect sensitive bootstrap kubeconfigs, which contain API server tokens intended for other hubs. These tokens have an extended validity of approximately 9.86 years, significantly increasing the risk of unauthorized access and information disclosure to other managed clusters.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **RHSA-2026:67516** · Red Hat · fixed in: Multicluster Global Hub 1.4.9 · released 2026-09-15 · [advisory](https://access.redhat.com/errata/RHSA-2026:67516)\n- **RHSA-2026:67842** · Red Hat · fixed in: Multicluster Global Hub 1.7.3 · released 2026-09-16 · [advisory](https://access.redhat.com/errata/RHSA-2026:67842)\n- **RHSA-2026:68515** · Red Hat · fixed in: Multicluster Global Hub 1.8.2 · released 2026-09-17 · [advisory](https://access.redhat.com/errata/RHSA-2026:68515)\n- **RHSA-2026:71597** · Red Hat · fixed in: Multicluster Global Hub 1.5.8 · released 2026-09-24 · [advisory](https://access.redhat.com/errata/RHSA-2026:71597)","depth":"sunlit","depthScore":35,"depthScoreParts":{"impact":34.7,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}