CVE-2026-73269Network attack vector

Cluster-wide privilege escalation via mismatched curator identity

Published Aug 12, 2026 · Updated Aug 25, 2026

Improper privilege management in Red Hat multicluster engine allows remote authenticated users to gain cluster-wide control. The cluster-curator-controller accepts a ClusterCurator whose name and namespace differ, then creates a cluster-scoped ClusterRoleBinding. Namespace-local permission to create that resource is sufficient; the resulting binding permits secrets access and modification, cluster actions, and deletion of hosted clusters or node pools.

CVSS severity9.9
Critical
EPSS probability0.33%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper privilege management in Red Hat multicluster engine allows remote authenticated users to gain cluster-wide control. The cluster-curator-controller accepts a ClusterCurator whose name and namespace differ, then creates a cluster-scoped ClusterRoleBinding. Namespace-local permission to create that resource is sufficient; the resulting binding permits secrets access and modification, cluster actions, and deletion of hosted clusters or node pools.

The record

CVE
CVE-2026-73269
Published
Aug 12, 2026
Updated
Aug 25, 2026
Vendor
389 Directory Server
Product
multicluster engine for Kubernetes
Classifications
CWE-269, T1068
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 12, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 25, 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 KubernetesAffected versions are unavailable in this record.

Published CVSS scores

9.9CVE ProgramCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
9.9Red HatCVSS:3.1/AV:N/AC:L/PR:L/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-269Improper Privilege Management
T1068Exploitation for Privilege Escalation

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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