CVE-2026-66721
2.7 · LOWOverview
CVE-2026-66721 is a low-severity vulnerability affecting apache cloudstack. It was published on August 21, 2026 and has a CVSS 3.1 base score of 2.7 (LOW).
This vulnerability has a CVSS 3.1 base score of 2.7, rated LOW. It can be exploited remotely over the network. Some level of privileges is required for exploitation.
Technical Description
Missing authorization issue for domain admins in CloudStack's host tags listing functionality.
Domain Admins, by default, have permission to call the listHostTags API, but the API returns host tags for every host in the environment without domain scoping. It should instead be restricted to only the hosts dedicated to that admin's domain.
This issue affects Apache CloudStack: from 4.12.0.0 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.
Remediation
Check the references section for vendor advisories and patches from apache. Update cloudstack to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| apache | cloudstack | >= 4.12.0.0, < 4.20.3.1 | Affected |
Frequently Asked Questions
What is CVE-2026-66721?
CVE-2026-66721 is a low-severity vulnerability affecting apache cloudstack. It was published on August 21, 2026 and has a CVSS 3.1 base score of 2.7 (LOW).
How severe is CVE-2026-66721?
This vulnerability has a CVSS 3.1 base score of 2.7, rated LOW. It can be exploited remotely over the network. Some level of privileges is required for exploitation.
How do I fix or remediate CVE-2026-66721?
Check the references section for vendor advisories and patches from apache. Update cloudstack to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2026-66721?
CyberStrike's AI-powered security agents can automatically detect CVE-2026-66721 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
AI agents map your attack surface to find vulnerabilities like this one.
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