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

Type: advisorySource: Official CVE List1 source record

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.

Announced Source revision 1
Original source ↗

CVE-2026-71576

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: cve:CVE-2026-71576

Multicluster Global Hub 1.4.9

Source reference: /containers/cna/affected/0/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Multicluster Global Hub 1.5.8

Source reference: /containers/cna/affected/1/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Multicluster Global Hub 1.6.6

Source reference: /containers/cna/affected/2/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Multicluster Global Hub 1.7.3

Source reference: /containers/cna/affected/3/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Multicluster Global Hub 1.8.2

Source reference: /containers/cna/affected/4/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Multicluster Global Hub 1.8.2

Source reference: /containers/cna/affected/5/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "cpes": [
      "cpe:/a:redhat:multicluster_globalhub:1.4::el9"
    ],
    "vendor": "Red Hat",
    "product": "Multicluster Global Hub 1.4.9",
    "versions": [
      {
        "status": "unaffected",
        "version": "1788355599",
        "lessThan": "*",
        "versionType": "rpm"
      }
    ],
    "packageName": "multicluster-globalhub/multicluster-globalhub-manager-rhel9",
    "collectionURL": "https://catalog.redhat.com/software/containers/",
    "defaultStatus": "affected"
  },
  {
    "cpes": [
      "cpe:/a:redhat:multicluster_globalhub:1.5::el9"
    ],
    "vendor": "Red Hat",
    "product": "Multicluster Global Hub 1.5.8",
    "versions": [
      {
        "status": "unaffected",
        "version": "1789515288",
        "lessThan": "*",
        "versionType": "rpm"
      }
    ],
    "packageName": "multicluster-globalhub/multicluster-globalhub-manager-rhel9",
    "collectionURL": "https://catalog.redhat.com/software/containers/",
    "defaultStatus": "affected"
  },
  {
    "cpes": [
      "cpe:/a:redhat:multicluster_globalhub:1.6::el9"
    ],
    "vendor": "Red Hat",
    "product": "Multicluster Global Hub 1.6.6",
    "versions": [
      {
        "status": "unaffected",
        "version": "1790086176",
        "lessThan": "*",
        "versionType": "rpm"
      }
    ],
    "packageName": "multicluster-globalhub/multicluster-globalhub-manager-rhel9",
    "collectionURL": "https://catalog.redhat.com/software/containers/",
    "defaultStatus": "affected"
  },
  {
    "cpes": [
      "cpe:/a:redhat:multicluster_globalhub:1.7::el9"
    ],
    "vendor": "Red Hat",
    "product": "Multicluster Global Hub 1.7.3",
    "versions": [
      {
        "status": "unaffected",
        "version": "1788377424",
        "lessThan": "*",
        "versionType": "rpm"
      }
    ],
    "packageName": "multicluster-globalhub/multicluster-globalhub-manager-rhel9",
    "collectionURL": "https://catalog.redhat.com/software/containers/",
    "defaultStatus": "affected"
  },
  {
    "cpes": [
      "cpe:/a:redhat:multicluster_globalhub:1.8::el9"
    ],
    "vendor": "Red Hat",
    "product": "Multicluster Global Hub 1.8.2",
    "versions": [
      {
        "status": "unaffected",
        "version": "1788359454",
        "lessThan": "*",
        "versionType": "rpm"
      }
    ],
    "packageName": "multicluster-globalhub/multicluster-globalhub-manager-rhel9",
    "collectionURL": "https://catalog.redhat.com/software/containers/",
    "defaultStatus": "affected"
  },
  {
    "cpes": [
      "cpe:/a:redhat:multicluster_globalhub:1.8::el9"
    ],
    "vendor": "Red Hat",
    "product": "Multicluster Global Hub 1.8.2",
    "versions": [
      {
        "status": "unaffected",
        "version": "1788359454",
        "lessThan": "*",
        "versionType": "rpm"
      }
    ],
    "packageName": "multicluster-globalhub/multicluster-globalhub-manager-rhel9",
    "collectionURL": "https://catalog.redhat.com/software/containers/",
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-71576

Source reference: /cveMetadata/cveId

Publisher severity

high

Source reference: /containers/cna/metrics

Event
#3835 · Revision 1
Added to Heist Feed
Publisher date
Read the original announcement