Vulnerability 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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Apache | Cloudstack | >= 4.11.0.0, < 4.20.3.0 |
Related Weaknesses (CWE)
References
- https://lists.apache.org/thread/n8mt5b7wkpysstb8w7rr9f02kc5cq2xmMailing ListVendor Advisory
- http://www.openwall.com/lists/oss-security/2026/05/09/6
FAQ
What is CVE-2026-25077?
CVE-2026-25077 is a vulnerability with a CVSS score of 8.8 (HIGH). 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 ...
How severe is CVE-2026-25077?
CVE-2026-25077 has been rated HIGH with a CVSS base score of 8.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-25077?
Check the references section above for vendor advisories and patch information. Affected products include: Apache Cloudstack.