CVE-2026-71576
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.
INFO
Published Date :
Aug. 10, 2026, 5:17 p.m.
Last Modified :
Oct. 24, 2026, 3:10 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | HIGH | 53f830b8-0a3f-465b-8143-3b8a9948e749 | ||||
| CVSS 3.1 | HIGH | [email protected] | ||||
| CVSS 3.1 | HIGH | MITRE-CVE |
Solution
- Validate the source identity of incoming CloudEvents.
- Restrict access to Kafka status topics.
- Monitor Kafka topics for suspicious activity.
- Apply security patches provided by the vendor.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-71576.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-71576 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-71576
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-71576 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-71576 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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CVE Translated by [email protected]
Oct. 24, 2026
Action Type Old Value New Value Changed Translation Title: Multicluster Global Hub de Red Hat, Description: Se encontró una vulnerabilidad en multicluster-global-hub. El componente gestor valida incorrectamente la identidad de origen de los CloudEvents entrantes en los temas de estado de Kafka. Un atacante remoto, después de comprometer un hub gestionado y obtener su certificado de cliente Kafka, puede manipular la identidad de origen autoafirmada. Esto permite al atacante falsificar o eliminar datos críticos, como información de cumplimiento, inventario y estado del clúster, perteneciente a otros hubs en la base de datos. Title: Multicluster Global Hub de Red Hat, Description: Se encontró una vulnerabilidad en multicluster-global-hub. El componente gestor valida incorrectamente la identidad de origen de los CloudEvents entrantes en los temas de estado de Kafka. Un atacante remoto, después de comprometer un hub gestionado y obtener su certificado de cliente Kafka, puede manipular la identidad de origen autoafirmada. Esto permite al atacante falsificar o eliminar datos críticos, como información de cumplimiento, inventario y estado del clúster, perteneciente a otros hubs en la base de datos. -
CVE Translated by [email protected]
Oct. 23, 2026
Action Type Old Value New Value Added Translation Title: Multicluster Global Hub de Red Hat, Description: Se encontró una vulnerabilidad en multicluster-global-hub. El componente gestor valida incorrectamente la identidad de origen de los CloudEvents entrantes en los temas de estado de Kafka. Un atacante remoto, después de comprometer un hub gestionado y obtener su certificado de cliente Kafka, puede manipular la identidad de origen autoafirmada. Esto permite al atacante falsificar o eliminar datos críticos, como información de cumplimiento, inventario y estado del clúster, perteneciente a otros hubs en la base de datos. -
CVE Modified by [email protected]
Sep. 29, 2026
Action Type Old Value New Value Added Affected Affected value modified. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/71xxx/CVE-2026-71576.json">CVE-2026-71576</a> Added Reference https://access.redhat.com/errata/RHSA-2026:73038 Added Reference https://access.redhat.com/errata/RHSA-2026:73419 -
CVE Modified by [email protected]
Sep. 24, 2026
Action Type Old Value New Value Added Affected Affected value modified. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/71xxx/CVE-2026-71576.json">CVE-2026-71576</a> Added Reference https://access.redhat.com/errata/RHSA-2026:71597 -
CVE Modified by [email protected]
Sep. 21, 2026
Action Type Old Value New Value Added Affected Affected value modified. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/71xxx/CVE-2026-71576.json">CVE-2026-71576</a> Added Reference https://access.redhat.com/errata/RHSA-2026:67516 Added Reference https://access.redhat.com/errata/RHSA-2026:67842 Added Reference https://access.redhat.com/errata/RHSA-2026:68515 Added Reference https://access.redhat.com/security/cve/CVE-2026-71576 Added Reference https://bugzilla.redhat.com/show_bug.cgi?id=2512513 Removed Reference https://access.redhat.com/security/cve/CVE-2026-71576 Removed Reference https://bugzilla.redhat.com/show_bug.cgi?id=2512513 -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Aug. 12, 2026
Action Type Old Value New Value Added SSVC {'id': 'CVE-2026-71576', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'no'}, {'technicalImpact': 'partial'}], 'version': '2.0.3', 'timestamp': '2026-08-12T15:44:50.677334Z'} -
New CVE Received by [email protected]
Aug. 10, 2026
Action Type Old Value New Value Added Affected [{'cpes': ['cpe:/a:redhat:multicluster_globalhub'], 'vendor': 'Red Hat', 'product': 'Multicluster Global Hub', 'packageName': 'multicluster-globalhub/multicluster-globalhub-manager-rhel9', 'collectionURL': 'https://access.redhat.com/downloads/content/package-browser/', 'defaultStatus': 'affected'}] 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. Added CVSS V3.1 AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:L Added CWE CWE-345 Added Reference https://access.redhat.com/security/cve/CVE-2026-71576 Added Reference https://bugzilla.redhat.com/show_bug.cgi?id=2512513