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CVE-2026-73269— Cluster-curator-controller: cluster-curator-controller: tenant-controllable trigger creates clusterrolebinding granting cluster-wide secrets access to namespace-local sa

Quick assessment

Affected
Red Hat multicluster engine for Kubernetes 2.10
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.

Stolostron Cluster-Curator-Controller是Stolostron组织的一个管理云平台集群的控制器。 Stolostron Cluster-Curator-Controller存在权限许可和访问控制问题漏洞，该漏洞源于cluster-curator-controller组件存在缺陷，本地用户通过创建特定命名的ClusterCurator资源可触发集群范围的ClusterRoleBinding，导致权限从命名空间本地访问提升至集群级控制，攻击者可访问和操作机密信息、管理集群操作

CVSS 9.9 · Critical EPSS 0.56% · P45

Affected Version Matrix 6

VendorProduct Version RangeStatus
Red Hat multicluster engine for Kubernetes 2.10 1787201612< * unaffected
Red Hat multicluster engine for Kubernetes 2.11 1787238383< * unaffected
Red Hat multicluster engine for Kubernetes 2.17 1786750700< * unaffected
Red Hat multicluster engine for Kubernetes 2.6 1787264185< * unaffected
Red Hat multicluster engine for Kubernetes 2.8 1787259011< * unaffected
Red Hat multicluster engine for Kubernetes 2.9 1787201646< * unaffected
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I. Basic Information for CVE-2026-73269

Vulnerability Information
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Vulnerability Title
Cluster-curator-controller: cluster-curator-controller: tenant-controllable trigger creates clusterrolebinding granting cluster-wide secrets access to namespace-local sa
Source: CVE Program / CVE List V5
Vulnerability Description
A flaw was found in the cluster-curator-controller component. A local user, by creating a ClusterCurator resource with a specific naming convention, can trigger the creation of a cluster-scoped ClusterRoleBinding. This allows the user to escalate their privileges from namespace-local access to cluster-wide control. This privilege escalation grants broad permissions, including the ability to access and manipulate secrets, manage cluster actions, and delete hosted clusters or node pools.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
特权管理不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Stolostron Cluster-Curator-Controller 权限许可和访问控制问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Stolostron Cluster-Curator-Controller是Stolostron组织的一个管理云平台集群的控制器。 Stolostron Cluster-Curator-Controller存在权限许可和访问控制问题漏洞，该漏洞源于cluster-curator-controller组件存在缺陷，本地用户通过创建特定命名的ClusterCurator资源可触发集群范围的ClusterRoleBinding，导致权限从命名空间本地访问提升至集群级控制，攻击者可访问和操作机密信息、管理集群操作
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 engine for Kubernetes 2.10 1787201612 ~ * cpe:/a:redhat:multicluster_engine:2.10::el9
Red Hat multicluster engine for Kubernetes 2.11 1787238383 ~ * cpe:/a:redhat:multicluster_engine:2.11::el9
Red Hat multicluster engine for Kubernetes 2.17 1786750700 ~ * cpe:/a:redhat:multicluster_engine:2.17::el9
Red Hat multicluster engine for Kubernetes 2.6 1787264185 ~ * cpe:/a:redhat:multicluster_engine:2.6::el9
Red Hat multicluster engine for Kubernetes 2.8 1787259011 ~ * cpe:/a:redhat:multicluster_engine:2.8::el9
Red Hat multicluster engine for Kubernetes 2.9 1787201646 ~ * cpe:/a:redhat:multicluster_engine:2.9::el9

II. Public POCs for CVE-2026-73269

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III. Intelligence Information for CVE-2026-73269

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Vendor Advisories for CVE-2026-73269 (6)

Other References for CVE-2026-73269 (1)

Same Patch Batch · Red Hat · 2026-08-12 · 19 CVEs total

CVE-2026-72526 9.9 CRITICAL Multicloud-integrations: multicloud-integrations: pull-model propagation allows hub tenant
CVE-2026-72508 9.9 CRITICAL Multicloud-operators-subscription: multicloud-operators-subscription: hub and spoke servic
CVE-2026-73268 9.9 CRITICAL Cluster-curator-controller: cluster-curator-controller: spec.install.overridejob allows ar
CVE-2026-70398 9.6 CRITICAL Multicloud-integrations: multicloud-integrations: gitopscluster.spec.argoserver.argonamesp
CVE-2026-71471 9.0 CRITICAL Acm-search-v2-rhel9: search-v2-operator: hub search cr collector.imageoverride propagated
CVE-2026-13622 8.8 HIGH Kubevirt: virt-handler-rhel9: kubevirt: virt-handler migration proxy follows symlinks allo
CVE-2026-71473 8.5 HIGH Acm-search-v2-rhel9: search-v2-operator: addonfactory.getvaluesfromaddonannotation enables
CVE-2026-73122 7.7 HIGH Multicloud-operators-channel: multicloud-operators-channel: auto-generated role grants eve
CVE-2026-66878 7.7 HIGH Multicloud-operators-subscription: multicloud-operators-subscription: fetchchannelreferenc
CVE-2026-19654 7.5 HIGH Rsyslog: a configuration-dependent issue in rsyslog's optional imptcp input module can all
CVE-2026-71469 7.5 HIGH Acm-search-v2-api-rhel9: search-v2-api: unbounded tokenreviews cache allows unauthenticate
CVE-2026-18726 6.5 MEDIUM Open-iscsi: open-iscsi: denial of service in iscsiuio router advertisement parsing
CVE-2026-18727 6.5 MEDIUM Open-iscsi: open-iscsi: integer underflow in iscsiuio dhcpv6 parsing
CVE-2026-71846 6.5 MEDIUM Insights-client: insights-client: clusterrole grants cluster-wide secrets get/list/watch b
CVE-2026-64927 6.4 MEDIUM Multicloud-operators-channel: multicloud-operators-channel: cross-namespace secret and con
CVE-2026-18663 5.9 MEDIUM 389-ds-base: 389-ds-base: pre-authentication double-free in get_ldapmessage_controls_ext()
CVE-2026-19130 5.8 MEDIUM Provider-credential-controller: provider-credential-controller: cross-namespace credential
CVE-2026-19548 5.5 MEDIUM Binutils: binutils: multiple use-after-free in add_archive_element via lto plugin processi

IV. Related Vulnerabilities

Same product: multicluster engine for Kubernetes 2.10
Same vendor: Red Hat
Same weakness: CWE-269

V. Comments for CVE-2026-73269

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