Apache CloudStack 4.20.3.0/4.21.0.0/4.22.1.0 Template/ISO Registration server-side request forgery

Summaryinfo

A vulnerability marked as critical has been reported in Apache CloudStack 4.20.3.0/4.21.0.0/4.22.1.0. This affects an unknown part of the component Template/ISO Registration. The manipulation leads to server-side request forgery. This vulnerability is referenced as CVE-2026-61422. Remote exploitation of the attack is possible. No exploit is available.

Detailsinfo

A vulnerability was found in Apache CloudStack 4.20.3.0/4.21.0.0/4.22.1.0. It has been rated as critical. This issue affects an unknown code of the component Template/ISO Registration. The manipulation with an unknown input leads to a server-side request forgery vulnerability. Using CWE to declare the problem leads to CWE-918. The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

Authenticated pre-validation SSRF vulnerability in Apache CloudStack's template and ISO registration functionality. When registering a template or ISO, CloudStack makes a live HTTP HEAD/GET call to determine file size for secondary storage usage-limit checks, and this happens before URL validation is performed. However, this does not pose a malicious template or ISO registration risk, as URL validation still occurs prior to the actual download by the Secondary Storage VM.This issue affects Apache CloudStack: in 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.

It is possible to read the advisory at lists.apache.org. The identification of this vulnerability is CVE-2026-61422 since 07/09/2026. The exploitation is known to be easy. The attack may be initiated remotely. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 08/21/2026).

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

• 4.20.3.0
• 4.21.0.0
• 4.22.1.0

License

• open-source

Website

• Vendor: https://www.apache.org/

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