CVE-2026-50266 (GCVE-0-2026-50266)

Vulnerability from cvelistv5 – Published: 2026-06-04 16:18 – Updated: 2026-06-04 17:28
VLAI
Summary
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).
Severity
2.2 (Low)
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:L/A:N
SSVC
Exploitation: poc Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-04 17:27 UTC
CWE
  • CWE-863 - Incorrect Authorization
Assigner
References
Impacted products
Vendor Product Version CPE status
OpenStack Neutron Affected: 25.0.0 , < 25.2.4 (semver)
Affected: 26.0.0 , < 26.0.4 (semver)
Affected: 27.0.0 , < 27.0.3 (semver)
Affected: 28.0.0 , < 28.0.1 (semver)
    cpe:2.3:a:openstack:neutron:*:*:*:*:*:*:*:*
    cpe:2.3:a:openstack:neutron:*:*:*:*:*:*:*:*
    cpe:2.3:a:openstack:neutron:*:*:*:*:*:*:*:*
    cpe:2.3:a:openstack:neutron:*:*:*:*:*:*:*:*
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