CVE-2026-6389

Cluster compromise via overprivileged Kubernetes service account

Published Apr 30, 2026 · Updated Apr 30, 2026

Improper privilege management in IBM Turbonomic Prometurbo Agent 8.16.0 through 8.17.6 allows local users to read cluster secrets. Its Kubernetes ClusterRole and ClusterRoleBinding grant the Prometurbo operator unrestricted cluster-wide secret access instead of least-privilege access. Exploitation requires control of the operator or its service account and exposes credentials that enable privilege escalation and cluster compromise.

CVSS severity8.8
High
EPSS probability0.11%
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 IBM Turbonomic Prometurbo Agent 8.16.0 through 8.17.6 allows local users to read cluster secrets. Its Kubernetes ClusterRole and ClusterRoleBinding grant the Prometurbo operator unrestricted cluster-wide secret access instead of least-privilege access. Exploitation requires control of the operator or its service account and exposes credentials that enable privilege escalation and cluster compromise.

The record

CVE
CVE-2026-6389
Published
Apr 30, 2026
Updated
Apr 30, 2026
Vendor
IBM
Product
Turbonomic Prometurbo Agent
Classifications
CWE-269, T1552.007
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 30, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 30, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=8.16.0 <=8.17.6

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

IBM · Turbonomic Prometurbo Agentversion=8.16.0 <=8.17.6

Published CVSS scores

7.8NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
8.8IBMCVSS:3.1/AV:L/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.

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No observations available

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

Weakness, pattern, technique

CWE-269Improper Privilege Management
T1552.007Unsecured Credentials: Container API

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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