{"id":"DEBIAN-CVE-2026-50266","details":"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 device_owner to a value that has \"network:\" at the beginning (\"network:dhcp\" for example). The default port RBAC policies incorrectly included PROJECT_MANAGER without requiring network ownership, allowing any project manager to obtain trusted network-service port behavior on shared networks. Depending on backend and deployment, this can bypass anti-spoofing and security group protections, enabling DHCP, MAC, or IP spoofing against other tenants on the shared network. This is a regression of CVE-2015-5240 (OSSA-2015-018).","modified":"2026-09-14T17:03:17.637830227Z","published":"2026-06-04T17:16:33.517Z","upstream":["CVE-2026-50266"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2026-50266"}],"affected":[{"package":{"name":"neutron","ecosystem":"Debian:13","purl":"pkg:deb/debian/neutron?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2:26.0.3-0+deb13u2"}]}],"versions":["2:26.0.0-9","2:26.0.0-9+deb13u1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-50266.json"}},{"package":{"name":"neutron","ecosystem":"Debian:14","purl":"pkg:deb/debian/neutron?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2:28.0.0-7"}]}],"versions":["2:26.0.0-9","2:27.0.0-1","2:27.0.0~rc1-1","2:27.0.0~rc1-2","2:27.0.1-1","2:27.0.1-2","2:27.0.1-3","2:27.0.1-4","2:27.0.1-5","2:27.0.1-6","2:28.0.0-1","2:28.0.0-2","2:28.0.0-3","2:28.0.0-4","2:28.0.0-5","2:28.0.0-6","2:28.0.0~rc1-1","2:28.0.0~rc1-2","2:28.0.0~rc2-1","2:28.0.0~rc2-2"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-50266.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:L/A:N"}]}