cvedb.io
CVE-2026-25199
CRITICAL · CVSS 9.1
EPSS exploitation probability: 0%
Published 2026-05-08T13:16:36.273 · Last modified 2026-06-17T10:24:17.837

Summary

Instances deployed via the Proxmox extension allow unauthorized access to instances belonging to other tenants. This issue affects Apache CloudStack: from 4.21.0.0 through 4.22.0.0. The Proxmox extension for CloudStack improperly uses a user-editable instance setting, proxmox_vmid, to associate CloudStack instances with Proxmox virtual machines. Because this value is not restricted or validated against tenant ownership and Proxmox VM IDs are predictable, a non-privileged attacker can modify the setting to reference a VM belonging to another account. This allows unauthorized cross-tenant access and enables full control over the targeted VM, including starting, stopping, and destroying the virtual machine. Users are recommended to upgrade to version 4.22.0.1, which fixes this iss

Affected products

apache — cloudstack

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References

This product uses data from the NVD API but is not endorsed or certified by the NVD. Informational only; not professional security advice.