Vulnerability-Lookup

GHSA-V7Q5-Q7P3-9VJM

Vulnerability from github – Published: 2026-08-10 18:32 – Updated: 2026-09-21 12:32

Details

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.

Severity

6.3 (Medium)


                  
                    CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N

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{
  "affected": [],
  "aliases": [
    "CVE-2026-71577"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-522"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-10T17:17:36Z",
    "severity": "MODERATE"
  },
  "details": "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.",
  "id": "GHSA-v7q5-q7p3-9vjm",
  "modified": "2026-09-21T12:32:32Z",
  "published": "2026-08-10T18:32:16Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-71577"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:67516"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:67842"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:68515"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/security/cve/CVE-2026-71577"
    },
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      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2512514"
    }
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  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2026-71577 (GCVE-0-2026-71577)

Vulnerability from cvelistv5 – Published: 2026-08-10 16:43 – Updated: 2026-09-21 11:29

Title

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

Summary

Severity

6.3 (Medium)


                        
                          CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-11 01:59 UTC

CWE

CWE-522 - Insufficiently Protected Credentials

Assigner

redhat redhat root

References

5 references

URL	Tags
https://access.redhat.com/errata/RHSA-2026:67516	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:67842	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:68515	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/security/cve/CVE-2026-71577	vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2512514	issue-trackingx_refsource_REDHAT

Impacted products

3 products

Vendor	Product	Version
Red Hat	Multicluster Global Hub 1.4.9	Unaffected: 1788355417 , < * (rpm) cpe:/a:redhat:multicluster_globalhub:1.4::el9
Red Hat	Multicluster Global Hub 1.7.3	Unaffected: 1788372439 , < * (rpm) cpe:/a:redhat:multicluster_globalhub:1.7::el9
Red Hat	Multicluster Global Hub 1.8.2	Unaffected: 1788359461 , < * (rpm) cpe:/a:redhat:multicluster_globalhub:1.8::el9

Date Public

2026-08-10 14:38

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                  },
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          "cpes": [
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          ],
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          "packageName": "multicluster-globalhub/multicluster-globalhub-rhel9-operator",
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          "product": "Multicluster Global Hub 1.7.3",
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      ],
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Sightings

Author	Source	Type	Date	Other

Nomenclature

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Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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GHSA-V7Q5-Q7P3-9VJM

CVE-2026-71577 (GCVE-0-2026-71577)

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