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Multicluster-global-hub: multicluster-global-hub: spec-topic read acl leaks bootstrap kubeconfigs to all managed hubs during migration

Type: advisorySource: Official CVE List1 source record

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.

Announced Source revision 1
Original source ↗

CVE-2026-71577

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-2026-71577

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": "1788355417",
        "lessThan": "*",
        "versionType": "rpm"
      }
    ],
    "packageName": "multicluster-globalhub/multicluster-globalhub-rhel9-operator",
    "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": "1789478830",
        "lessThan": "*",
        "versionType": "rpm"
      }
    ],
    "packageName": "multicluster-globalhub/multicluster-globalhub-rhel9-operator",
    "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": "1790085268",
        "lessThan": "*",
        "versionType": "rpm"
      }
    ],
    "packageName": "multicluster-globalhub/multicluster-globalhub-rhel9-operator",
    "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": "1788372439",
        "lessThan": "*",
        "versionType": "rpm"
      }
    ],
    "packageName": "multicluster-globalhub/multicluster-globalhub-rhel9-operator",
    "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": "1788359461",
        "lessThan": "*",
        "versionType": "rpm"
      }
    ],
    "packageName": "multicluster-globalhub/multicluster-globalhub-rhel9-operator",
    "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": "1790638386",
        "lessThan": "*",
        "versionType": "rpm"
      }
    ],
    "packageName": "multicluster-globalhub/multicluster-globalhub-rhel9-operator",
    "collectionURL": "https://catalog.redhat.com/software/containers/",
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-71577

Source reference: /cveMetadata/cveId

Publisher severity

medium

Source reference: /containers/cna/metrics

Event
#3869 · Revision 1
Added to Heist Feed
Publisher date
Read the original announcement