Vulnerability · Published Sep 1, 2026 · Assigned by INCIBE
CVE-2026-84165Lack of authorisation in OpenNebula by OpenNebula Systems
High 8.7
In plain English
A high-severity improper access control in OpenNebula from OpenNebula Systems. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 38% of all known vulnerabilities).
Official description
A vulnerability relating to incorrect access control in OpenNebula by OpenNebula Systems, affecting all versions prior to 7.4. This vulnerability could allow an authenticated user with basic permissions to execute commands on virtual machines belonging to other users via the `one.vm.exec` function, without proper verification of access permissions. To exploit the vulnerability, it is only necessary to know the virtual machine’s identifier and for qemu-agent to be enabled on that machine. Exploitation could allow commands to be executed and compromise the confidentiality, integrity and availability of the affected virtual machines.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| OpenNebula Systems | OpenNebula | 0 – before 7.4 |
Weakness: CWE-284 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N