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CVE-2026-10059— Cluster-curator-controller: cluster-curator-controller: namespace admin can escalate to cluster-wide curator authority via clustercurator serviceaccount token

Quick assessment

Affected
Red Hat multicluster engine for Kubernetes 2.1
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 Engine for Kubernetes是美国Red Hat公司的一个管理Kubernetes多集群的引擎软件。 Red Hat Multicluster Engine for Kubernetes存在权限许可和访问控制问题漏洞，该漏洞源于ClusterCurator控制器存在权限控制缺陷，具有命名空间级权限的租户管理员可通过创建命名空间级ClusterCurator获得集群级管理员令牌，导致权限提升。

CVSS 9.1 · Critical EPSS 0.64% · P49

Affected Version Matrix 5

VendorProduct Version RangeStatus
Red Hat multicluster engine for Kubernetes 2.1 1787201612< * unaffected
Red Hat multicluster engine for Kubernetes 2.11 1787238383< * 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-2026-10059

Vulnerability Information
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Vulnerability Title
Cluster-curator-controller: cluster-curator-controller: namespace admin can escalate to cluster-wide curator authority via clustercurator serviceaccount token
Source: CVE Program / CVE List V5
Vulnerability Description
A flaw was found in the Multicluster Engine for Kubernetes ClusterCurator controller. A tenant administrator with namespace-scoped privileges can exploit this vulnerability by creating a namespaced ClusterCurator. This action inadvertently grants the tenant administrator the ability to mint a token for a ServiceAccount with cluster-wide administrative authority. This leads to a privilege escalation, allowing the tenant administrator to gain full control over the cluster.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
特权授予不正确
Source: CVE Program / CVE List V5
Vulnerability Title
Red Hat Multicluster Engine for Kubernetes 权限许可和访问控制问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Red Hat Multicluster Engine for Kubernetes是美国Red Hat公司的一个管理Kubernetes多集群的引擎软件。 Red Hat Multicluster Engine for Kubernetes存在权限许可和访问控制问题漏洞，该漏洞源于ClusterCurator控制器存在权限控制缺陷，具有命名空间级权限的租户管理员可通过创建命名空间级ClusterCurator获得集群级管理员令牌，导致权限提升。
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 2.1 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 2.6 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-2026-10059

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III. Intelligence Information for CVE-2026-10059

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Vendor Advisories for CVE-2026-10059 (6)

Other References for CVE-2026-10059 (1)

Same Patch Batch · Red Hat · 2026-08-05 · 11 CVEs total

CVE-2026-10090 9.0 CRITICAL Multicluster-operators-subscription: multicluster-operators-subscription: namespace edit u
CVE-2026-15572 8.8 HIGH Keycloak-services: keycloak-services: dcr protocol mapper type-swap policy bypass allows p
CVE-2026-15573 8.1 HIGH Keycloak-services: keycloak-services: authorization bypass via unnormalized uri matching i
CVE-2026-16102 8.1 HIGH Keycloak-services: keycloak-services: default dcr policy allows role forgery via user prop
CVE-2026-16443 7.4 HIGH Keycloak-services: keycloak-services: saml broker metadata import disables response signat
CVE-2026-16442 7.4 HIGH Keycloak-services: keycloak-services: saml idp-initiated broker login bypasses link-only r
CVE-2026-16100 6.5 MEDIUM Keycloak-services: keycloak-services: unbounded metric cardinality in user event metrics v
CVE-2026-49331 6.5 MEDIUM Openshift/oauth-proxy: openshift/oauth-proxy: unauthenticated identity header injection on
CVE-2026-44605 5.5 MEDIUM Rpm: heap buffer overflow in ndb slot table parsing
CVE-2026-16071 5.4 MEDIUM Keycloak-services: keycloak-services: ldap entry-dn user search bypasses configured users

IV. Related Vulnerabilities

Same product: multicluster engine for Kubernetes 2.1
Same vendor: Red Hat
Same weakness: CWE-266

V. Comments for CVE-2026-10059

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