Apache CloudStack up to 4.7.0/4.20.3.0/4.21.0.0/4.22.1.0 Scoped Global Configuration denial of service

Summaryinfo

A vulnerability described as critical has been identified in Apache CloudStack up to 4.7.0/4.20.3.0/4.21.0.0/4.22.1.0. This issue affects some unknown processing of the component Scoped Global Configuration. Such manipulation leads to denial of service. This vulnerability is uniquely identified as CVE-2026-59654. The attack can be launched remotely. No exploit exists.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Apache CloudStack up to 4.7.0/4.20.3.0/4.21.0.0/4.22.1.0. Affected by this issue is an unknown code block of the component Scoped Global Configuration. The manipulation with an unknown input leads to a denial of service vulnerability. Using CWE to declare the problem leads to CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. Impacted is availability. CVE summarizes:

Missing Release of Resource after Effective Lifetime vulnerability in Apache CloudStack's scoped global configuration functionality. It affects different modules and plugins of the CloudStack management server, including Quota, Host-HA, etc., and may lead to eventual denial of service (DoS) scenario for the management server. This issue affects Apache CloudStack: from 4.7.0 through 4.20.3.0 and from 4.21.0.0 through 4.22.1.0. Users are recommended to upgrade to version 4.20.3.1 or 4.22.1.1 or later, which fixes the issue.

The advisory is shared for download at lists.apache.org. This vulnerability is handled as CVE-2026-59654 since 07/06/2026. The exploitation is known to be easy. The attack may be launched remotely. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 08/21/2026). The MITRE ATT&CK project declares the attack technique as T1499.

Upgrading to version 4.20.3.1 or 4.22.1.1 eliminates this vulnerability.

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Productinfo

Type

• Cloud Software

Vendor

• Apache

Name

• CloudStack

Version

• 4.0
• 4.1
• 4.2
• 4.3
• 4.4
• 4.5
• 4.6
• 4.7.0
• 4.20.0
• 4.20.1
• 4.20.2
• 4.20.3.0
• 4.21.0
• 4.22.0
• 4.22.1.0

License

• open-source

Website

• Vendor: https://www.apache.org/

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