What’s Vulnerable › Vulnerabilities
CVE-2026-61422: Apache CloudStack: Authenticated pre-validation SSRF in registerTemplate
- Severity: medium (CVSS 4.3 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.4% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-08-21 · updated 2026-10-16
- Weakness: CWE-918
Description
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.
Affected products
- Apache Software Foundation Apache CloudStack: from 4.21.0.0 before 4.22.1.1; 4.20.3.0 — fixed in 4.22.1.1
How to fix
Upgrade to a fixed version: Apache Software Foundation Apache CloudStack 4.22.1.1. Check the vendor advisory for mitigations.
References
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