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

Vulnerability from cvelistv5 – Published: 2026-08-10 16:43 – Updated: 2026-08-11 01:59
VLAI
Title
Multicluster-global-hub: multicluster-global-hub: spec-topic read acl leaks bootstrap kubeconfigs to all managed hubs during migration
Summary
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
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
References
URL Tags
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
Vendor Product Version
Red Hat Multicluster Global Hub     cpe:/a:redhat:multicluster_globalhub
 Create a notification for this product.
Date Public
2026-08-10 14:38
Show details on NVD website
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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • 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.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


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