CVE-2026-55707
Fixed in a distro release EPSS <1%CVSS 7.1
In OpenStack Neutron before 28.0.2, the subnetpool onboarding API does not verify ownership of the target subnets. An authenticated user can onboard subnets from another project's shared network into their own subnetpool, mutating the victim's subnet state and altering L3 routing and address scope behavior for victim routers.
Products: openstack neutron
Distro releases
| Release | Package | Fixed in |
|---|---|---|
| Debian 12 | neutron | 2:21.0.0-7+deb12u1 |
| Debian 13 | neutron | 2:26.0.3-0+deb13u3 |
| Debian 14 | neutron | 2:28.0.1-2 |
| Ubuntu 16.04 LTS | neutron | no fix |
| Ubuntu 18.04 LTS | neutron | no fix |
| Ubuntu 20.04 LTS | neutron | no fix |
| Ubuntu 22.04 LTS | neutron | no fix |
| Ubuntu 24.04 LTS | neutron | no fix |
| Ubuntu 26.04 LTS | neutron | no fix |
| Ubuntu 26.10 | neutron | no fix |