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LOW · 2.2

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 that has "network:" at the beginning ("ne...

Vulnerability 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).

CVSS Score

2.2

LOW

CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:L/A:N
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
HIGH
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
LOW
Availability
NONE

Related Weaknesses (CWE)

CWE-863

References

FAQ

What is CVE-2026-50266?

CVE-2026-50266 is a vulnerability with a CVSS score of 2.2 (LOW). 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 ("ne...

How severe is CVE-2026-50266?

CVE-2026-50266 has been rated LOW with a CVSS base score of 2.2/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-50266?

Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.