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).
Metrics
Affected Vendors & Products
References
History
Thu, 04 Jun 2026 16:45:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | 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). | |
| First Time appeared |
Openstack
Openstack neutron |
|
| Weaknesses | CWE-863 | |
| CPEs | cpe:2.3:a:openstack:neutron:*:*:*:*:*:*:*:* | |
| Vendors & Products |
Openstack
Openstack neutron |
|
| References |
| |
| Metrics |
cvssV3_1
|
Status: PUBLISHED
Assigner: mitre
Published:
Updated: 2026-06-04T17:28:01.143Z
Reserved: 2026-06-04T16:18:38.592Z
Link: CVE-2026-50266
No data.
Status : Received
Published: 2026-06-04T17:16:33.517
Modified: 2026-06-04T17:16:33.517
Link: CVE-2026-50266
No data.
OpenCVE Enrichment
No data.