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{"bugzilla": {"description": "multicluster-global-hub: multicluster-global-hub: Spec-topic Read ACL leaks bootstrap kubeconfigs to all managed hubs during migration", "id": "2512514", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2512514"}, "csaw": false, "cvss3": {"cvss3_base_score": "6.3", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N", "status": "draft"}, "cwe": "CWE-522", "details": ["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 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."], "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-2026-71577", "package_state": [{"cpe": "cpe:/a:redhat:multicluster_globalhub", "fix_state": "Affected", "package_name": "multicluster-globalhub/multicluster-globalhub-rhel9-operator", "product_name": "Multicluster Global Hub"}], "public_date": "2026-08-10T14:38:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-71577\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-71577"], "statement": "Moderate: A flaw in multicluster-global-hub allows a compromised managed hub to obtain a long-lived API server token for a target hub during a ManagedClusterMigration. This occurs because the operator grants broad read access to the shared Kafka topic and transmits bootstrap kubeconfigs with extended token validity in plaintext. Exploitation requires both a prior compromise of a managed hub and an active migration initiated by a global-hub administrator.", "threat_severity": "Moderate"}

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