CVE-2026-25077
Description
Account users are allowed by default to register templates to be downloaded directly to the primary storage for deploying instances using the KVM hypervisor. Due to missing file name sanitization, an attacker can register malicious templates to execute arbitrary code on the KVM hosts. This can result in the compromise of resource integrity and confidentiality, data loss, denial of service, and availability of the KVM-based infrastructure managed by CloudStack. Users are recommended to upgrade to Apache CloudStack versions 4.20.3.0 or 4.22.0.1, or later, which fixes this issue.
How to fix
- apache cloudstack4.20.3.0, 4.22.0.1 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| apache cloudstack | 4.11.0.0 ≤ v < 4.20.3.0, 4.21.0.0 ≤ v < 4.22.0.1 | 4.20.3.0, 4.22.0.1 |
Check your version
Choose the product and enter the version you run to see whether it falls in the affected range.
Attack Surface Management
See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.