{"id":"CVE-2026-71576","aliases":["EUVD-2026-55674","GHSA-q5c4-r3vh-f379"],"status":"published","title":"Multicluster-global-hub: multicluster-global-hub: manager trusts self-asserted evt.source() for leaf-hub identity in all status handlers","description":"A flaw was found in multicluster-global-hub. The manager component improperly validates the source identity of incoming CloudEvents on Kafka status topics. A remote attacker, after compromising a managed hub and obtaining its Kafka client certificate, can manipulate the self-asserted source identity. This allows the attacker to falsify or delete critical data, such as compliance, inventory, and cluster health information, belonging to other hubs in the database.","severity":{"version":"3.1","score":8.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:L","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.00295,"percentile":0.22354,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-345"],"published":"2026-08-10T16:41:53Z","modified":"2026-10-24T15:10:00Z","products":[{"vendor":"red hat","product":"multicluster global hub 1.4.9"},{"vendor":"red hat","product":"multicluster global hub 1.5.8"},{"vendor":"red hat","product":"multicluster global hub 1.6.6"},{"vendor":"red hat","product":"multicluster global hub 1.7.3"},{"vendor":"red hat","product":"multicluster global hub 1.8.2"}],"references":[{"url":"https://access.redhat.com/errata/RHSA-2026:67516","tags":["vendor-advisory","x_refsource_REDHAT"]},{"url":"https://access.redhat.com/errata/RHSA-2026:67842","tags":["vendor-advisory","x_refsource_REDHAT"]},{"url":"https://access.redhat.com/errata/RHSA-2026:68515","tags":["vendor-advisory","x_refsource_REDHAT"]},{"url":"https://access.redhat.com/errata/RHSA-2026:71597","tags":["vendor-advisory","x_refsource_REDHAT"]},{"url":"https://access.redhat.com/errata/RHSA-2026:73038","tags":["vendor-advisory","x_refsource_REDHAT"]},{"url":"https://access.redhat.com/errata/RHSA-2026:73419","tags":["vendor-advisory","x_refsource_REDHAT"]},{"url":"https://access.redhat.com/security/cve/CVE-2026-71576","tags":["vdb-entry","x_refsource_REDHAT"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2512513","tags":["issue-tracking","x_refsource_REDHAT"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-71576"},{"url":"https://github.com/advisories/GHSA-q5c4-r3vh-f379"}],"sources":{"cve":[{"id":"CVE-2026-71576","title":"Multicluster-global-hub: multicluster-global-hub: manager trusts self-asserted evt.source() for leaf-hub identity in all status handlers","description":"A flaw was found in multicluster-global-hub. The manager component improperly validates the source identity of incoming CloudEvents on Kafka status topics. A remote attacker, after compromising a managed hub and obtaining its Kafka client certificate, can manipulate the self-asserted source identity. This allows the attacker to falsify or delete critical data, such as compliance, inventory, and cluster health information, belonging to other hubs in the database.","status":"published","published":"2026-08-10T16:41:53.193Z","modified":"2026-09-29T16:43:50.602Z","cvss":[{"version":"3.1","score":8.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:L","level":"high","assessor":"cna"}],"cwes":["CWE-345"],"updated_at":"2026-11-02T14:19:49.199185Z"}],"euvd":[{"id":"EUVD-2026-55674","description":"A flaw was found in multicluster-global-hub. The manager component improperly validates the source identity of incoming CloudEvents on Kafka status topics. A remote attacker, after compromising a managed hub and obtaining its Kafka client certificate, can manipulate the self-asserted source identity. This allows the attacker to falsify or delete critical data, such as compliance, inventory, and cluster health information, belonging to other hubs in the database.","status":"published","published":"2026-08-10T16:41:53Z","modified":"2026-09-29T16:43:50Z","cvss":[{"version":"3.1","score":8.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:L","level":"high"}],"updated_at":"2026-11-02T17:27:51.995341Z"}],"ghsa":[{"id":"GHSA-q5c4-r3vh-f379","title":"A flaw was found in multicluster-global-hub. The manager component improperly validates the...","description":"A flaw was found in multicluster-global-hub. The manager component improperly validates the source identity of incoming CloudEvents on Kafka status topics. A remote attacker, after compromising a managed hub and obtaining its Kafka client certificate, can manipulate the self-asserted source identity. This allows the attacker to falsify or delete critical data, such as compliance, inventory, and cluster health information, belonging to other hubs in the database.","status":"published","published":"2026-08-10T18:32:16Z","modified":"2026-09-29T18:31:28Z","cvss":[{"version":"3.1","score":8.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:L","level":"high"}],"cwes":["CWE-345"],"updated_at":"2026-11-02T15:12:33.840327Z"}],"nvd":[{"id":"CVE-2026-71576","description":"A flaw was found in multicluster-global-hub. The manager component improperly validates the source identity of incoming CloudEvents on Kafka status topics. A remote attacker, after compromising a managed hub and obtaining its Kafka client certificate, can manipulate the self-asserted source identity. This allows the attacker to falsify or delete critical data, such as compliance, inventory, and cluster health information, belonging to other hubs in the database.","status":"published","published":"2026-08-10T17:17:36.06Z","modified":"2026-10-24T15:10:00.19Z","cvss":[{"version":"3.1","score":8.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:L","level":"high","assessor":"secondary"}],"cwes":["CWE-345"],"updated_at":"2026-11-02T14:12:36.102748Z"}]}}