CVE-2025-26521Network attack vector

Account compromise via project-shared Kubernetes credentials

Published Jun 10, 2025 · Updated Feb 26, 2026

Sensitive-information exposure in Apache CloudStack allows remote authenticated users to steal a CKS cluster creator's API keys. When a user creates a CKS cluster inside a project, CloudStack writes that caller's kubeadmin API and secret keys into the cluster's kube-system cloudstack-secret instead of using project-scoped service credentials. Any project member with access to that Kubernetes cluster can read the shared secret, impersonate the creator, and perform privileged actions against resources owned by the creator's account.

CVSS severity8.1
High
EPSS probability0.65%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Sensitive-information exposure in Apache CloudStack allows remote authenticated users to steal a CKS cluster creator's API keys. When a user creates a CKS cluster inside a project, CloudStack writes that caller's kubeadmin API and secret keys into the cluster's kube-system cloudstack-secret instead of using project-scoped service credentials. Any project member with access to that Kubernetes cluster can read the shared secret, impersonate the creator, and perform privileged actions against resources owned by the creator's account.

The record

CVE
CVE-2025-26521
Published
Jun 10, 2025
Updated
Feb 26, 2026
Vendor
The Apache Software Foundation
Product
Apache CloudStack
Classifications
CWE-200, T1552.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 10, 2025CVE publishedPublication date reported by the CVE source.
  2. Feb 26, 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=4.17.0.0 <4.19.3.0
  2. Affected versionversion=4.20.0.0 <4.20.1.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

The Apache Software Foundation · Apache CloudStackversion=4.17.0.0 <4.19.3.0; version=4.20.0.0 <4.20.1.0

Published CVSS scores

8.1CISA-ADPCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

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-200Exposure of Sensitive Information to an Unauthorized Actor
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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