OpenStack Neutron: Neutron port RBAC policy bypass allows project managers to set trusted device owners on shared networks

In OpenStack Neutron before 28.0.1, a project manager can create or update a port on a shared network owned by another project and set deviceowner to a value that has "network:" at the beginning "network:dhcp" for example. The default port RBAC policies incorrectly included PROJECTMANAGER without...

CVE-2026-50266

OpenStack Neutron before 28.0.1 is affected. A port on a shared network owned by another project can be created or updated by a project manager with device_owner starting with a network: prefix (e.g., network:dhcp). The default RBAC policies did not require network ownership, allowing access to t...