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CVE-2026-71577— Multicluster-global-hub: multicluster-global-hub: spec-topic read acl leaks bootstrap kubeconfigs to all managed hubs during migration

Quick assessment

Affected
Red Hat Multicluster Global Hub 1.4.9
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Red Hat Multicluster Global Hub是美国Red Hat公司的一款信息化产品。 Red Hat Multicluster Global Hub 存在信任管理问题漏洞，该漏洞源于在ManagedClusterMigration期间系统错误地授予所有托管hub对共享通信主题的读访问权限，可能导致未授权访问和信息泄露风险。

CVSS 6.3 · Medium EPSS 0.42% · P34

Affected Version Matrix 6

VendorProduct Version RangeStatus
Red Hat Multicluster Global Hub 1.4.9 1788355417< * unaffected
Red Hat Multicluster Global Hub 1.5.8 1789478830< * unaffected
Red Hat Multicluster Global Hub 1.6.6 1790085268< * unaffected
Red Hat Multicluster Global Hub 1.7.3 1788372439< * unaffected
Red Hat Multicluster Global Hub 1.8.2 1788359461< * unaffected
1790638386< * unaffected
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I. Basic Information for CVE-2026-71577

Vulnerability Information
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Vulnerability Title
Multicluster-global-hub: multicluster-global-hub: spec-topic read acl leaks bootstrap kubeconfigs to all managed hubs during migration
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
不充分的凭证保护机制
Source: CVE Program / CVE List V5
Vulnerability Title
Red Hat Multicluster Global Hub 信任管理问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Red Hat Multicluster Global Hub是美国Red Hat公司的一款信息化产品。 Red Hat Multicluster Global Hub 存在信任管理问题漏洞，该漏洞源于在ManagedClusterMigration期间系统错误地授予所有托管hub对共享通信主题的读访问权限，可能导致未授权访问和信息泄露风险。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Red Hat Multicluster Global Hub 1.4.9 1788355417 ~ * cpe:/a:redhat:multicluster_globalhub:1.4::el9
Red Hat Multicluster Global Hub 1.5.8 1789478830 ~ * cpe:/a:redhat:multicluster_globalhub:1.5::el9
Red Hat Multicluster Global Hub 1.6.6 1790085268 ~ * cpe:/a:redhat:multicluster_globalhub:1.6::el9
Red Hat Multicluster Global Hub 1.7.3 1788372439 ~ * cpe:/a:redhat:multicluster_globalhub:1.7::el9
Red Hat Multicluster Global Hub 1.8.2 1788359461 ~ * cpe:/a:redhat:multicluster_globalhub:1.8::el9
Red Hat Multicluster Global Hub 1.8.2 1790638386 ~ * cpe:/a:redhat:multicluster_globalhub:1.8::el9

II. Public POCs for CVE-2026-71577

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III. Intelligence Information for CVE-2026-71577

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Vendor Advisories for CVE-2026-71577 (8)

Same Patch Batch · Red Hat · 2026-08-10 · 28 CVEs total

CVE-2026-18948 9.9 CRITICAL Feast: feast: unsafe dill deserialization of registry-stored udfs — rce on feature server
CVE-2026-14450 9.9 CRITICAL Maas-billing: maas api: privilege escalation via forged http headers due to missing authen
CVE-2026-18951 8.8 HIGH Odh-training-operator-rhel9: [trainer v2 security] trn-02: rhoai overlay aggregates trainj
CVE-2026-18950 8.8 HIGH Odh-dashboard: odh-dashboard: confused-deputy privilege escalation via unchecked roleref i
CVE-2026-18949 8.8 HIGH Odh-dashboard: odh-dashboard: clusterrole grants cluster-wide crud on secrets and rbac man
CVE-2026-18982 8.8 HIGH Odh-training-operator-rhel9: rhoai fork aggregates training job create onto native edit/ad
CVE-2026-18617 8.8 HIGH Data-science-pipelines-operator: dspo: mysql dsn parameter injection via customextraparams
CVE-2026-18608 8.7 HIGH Data-science-pipelines-operator: dspo: operator clusterrole grants pods/exec:*, kubeflow.o
CVE-2026-18947 8.5 HIGH Feast: feast: authorization bypass in /materialize endpoints enables dos via unauthorized
CVE-2026-71576 8.5 HIGH Multicluster-global-hub: multicluster-global-hub: manager trusts self-asserted evt.source(
CVE-2026-15467 8.1 HIGH Trustyai-service-operator: trustyai-service-operator: lmevaljob sidecar containers bypass
CVE-2026-15581 8.0 HIGH Trustyai-service-operator: trustyai-service-operator: tas internal service bypasses kube-r
CVE-2026-63622 7.8 HIGH Libvirt: swtpm privilege escalation via symlink following
CVE-2026-18941 7.7 HIGH Feast: feast-operator: feast: default authentication mode is no_auth — shared multi-tenant
CVE-2026-18621 7.6 HIGH Data-sciences-pipeline: dsp: v1 argo template path accepts arbitrary workflow spec, bypass
CVE-2026-19387 7.6 HIGH Gstreamer: gstreamer1-plugins-bad-free: gstreamer: heap out-of-bounds write in adpcmdec im
CVE-2026-18611 7.5 HIGH Data-science-pipelines-operator: dspo: cryptographically weak secret generation (math/rand
CVE-2026-18618 7.5 HIGH Ml-metdata: bundled grpc 1.46.3 (2022) with published http/2 dos cves — directly reachable
CVE-2026-19389 7.1 HIGH Gstreamer: gstreamer1-plugins-ugly-free: gstreamer: integer overflow/underflow in asfdemux
CVE-2026-18620 7.1 HIGH Data-sciences-pipeline: user-controlled serviceaccount for workflow pods without authoriza

Showing top 20 of 28 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Multicluster Global Hub 1.4.9
Same vendor: Red Hat
Same weakness: CWE-522

V. Comments for CVE-2026-71577

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