CVE-2026-50266
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 …
Impact
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).
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| pip | neutron | < 28.0.1 | 28.0.1 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/advisories/GHSA-qmc5-gv6v-8p22
- https://nvd.nist.gov/vuln/detail/CVE-2026-50266
- https://bugs.launchpad.net/neutron/+bug/2152115
- https://launchpad.net/bugs/2152115
- https://review.opendev.org/990273
- https://review.opendev.org/990353
- https://review.opendev.org/990356
- https://www.openwall.com/lists/oss-security/2026/06/04/6