CVE-2026-10059Network attack vector

Tenant-to-cluster administrator escalation via ServiceAccount token

Published Aug 5, 2026 · Updated Aug 26, 2026

Privilege escalation in Red Hat multicluster engine for Kubernetes allows remote authenticated users to gain cluster-wide control. The ClusterCurator controller creates cluster-scoped RBAC for a ServiceAccount in a tenant-controlled namespace, letting that tenant mint its token. Namespace-scoped tenant administrator privileges and permission to create a namespaced ClusterCurator are required.

CVSS severity9.1
Critical
EPSS probability0.34%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Privilege escalation in Red Hat multicluster engine for Kubernetes allows remote authenticated users to gain cluster-wide control. The ClusterCurator controller creates cluster-scoped RBAC for a ServiceAccount in a tenant-controlled namespace, letting that tenant mint its token. Namespace-scoped tenant administrator privileges and permission to create a namespaced ClusterCurator are required.

The record

CVE
CVE-2026-10059
Published
Aug 5, 2026
Updated
Aug 26, 2026
Vendor
389 Directory Server
Product
multicluster engine for Kubernetes 2.6
Classifications
CWE-266, T1078.004
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 5, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 26, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Affected versions are unavailable in this record. Check the vendor advisory for version and patch details.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

389 Directory Server · multicluster engine for Kubernetes 2.6Affected versions are unavailable in this record.
389 Directory Server · multicluster engine for Kubernetes 2.10Affected versions are unavailable in this record.
389 Directory Server · multicluster engine for Kubernetes 2.8Affected versions are unavailable in this record.
389 Directory Server · multicluster engine for Kubernetes 2.9Affected versions are unavailable in this record.
389 Directory Server · multicluster engine for KubernetesAffected versions are unavailable in this record.

Published CVSS scores

9.1Red HatCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-266Incorrect Privilege Assignment
T1078.004Valid Accounts: Cloud Accounts

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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