CVE-2026-71576

Multicluster-global-hub: multicluster-global-hub: manager trusts self-asserted evt.source() for leaf-hub identity in all status handlers

Published Aug 10, 2026 CVSS 3.1 · 8.5 High EPSS < 1% KEV · Not listed
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.

Remediation

Vendor Workaround

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.

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
CPEs cpe:/a:redhat:multicluster_globalhub:1.5::el9
References
Type Values Removed Values Added
CPEs cpe:/a:redhat:multicluster_globalhub cpe:/a:redhat:multicluster_globalhub:1.4::el9
cpe:/a:redhat:multicluster_globalhub:1.7::el9
cpe:/a:redhat:multicluster_globalhub:1.8::el9
References
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
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.
Title Multicluster-global-hub: multicluster-global-hub: manager trusts self-asserted evt.source() for leaf-hub identity in all status handlers
First Time appeared Redhat
Redhat multicluster Globalhub
Weaknesses CWE-345
CPEs cpe:/a:redhat:multicluster_globalhub
Vendors & Products Redhat
Redhat multicluster Globalhub
References
Metrics cvssV3_1

{'score': 8.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:L'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
redhat
Published
Updated
Sep 29, 2026, 4:43 PM
Reserved
Aug 7, 2026, 2:20 PM
Status
Awaiting Analysis
Published
Aug 10, 2026, 5:17 PM
Modified
Oct 24, 2026, 3:10 PM
Severity
Important
Public date
Aug 10, 2026, 2:38 PM