Bug 2514220 (CVE-2026-73269) - CVE-2026-73269 cluster-curator-controller: cluster-curator-controller: tenant-controllable trigger creates ClusterRoleBinding granting cluster-wide secrets access to namespace-local SA
Summary: CVE-2026-73269 cluster-curator-controller: cluster-curator-controller: tenant...
Keywords:
Status: NEW
Alias: CVE-2026-73269
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-08-11 17:18 UTC by OSIDB Bzimport
Modified: 2026-08-12 17:44 UTC (History)
2 users (show)

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Description OSIDB Bzimport 2026-08-11 17:18:43 UTC 
A flaw was found in the cluster-curator-controller component of multicluster engine (MCE). When a ClusterCurator resource is created with metadata.name different from metadata.namespace, the ApplyRBACHypershift function creates a RoleBinding in an arbitrary namespace (specified by curator.Name) and a cluster-scoped ClusterRoleBinding (curator-crb), both binding the tenant's namespace-local cluster-installer ServiceAccount to the curator ClusterRole. This ClusterRole grants cluster-wide secrets:get/create, managedclusteractions:*, and hostedclusters/nodepools/managedclusters delete permissions. A tenant can escalate from namespace-local access to cluster-wide privileges with no admission controls.

Upstream repo: https://github.com/stolostron/cluster-curator-controller
Audited commit: 0e050d6e5edf5d2fbc2794fa468bdffd056b444f
Jira tracker: ACM-38729
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