CVE-2026-50266

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 de...

Published: 2026-06-04 · Last updated: 2026-06-04

Severity and scoring

CVSS: 2.2 LOW
Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:L/A:N
CWE: CWE-863

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).

Source: NVD

References

[NVD]https://nvd.nist.gov/vuln/detail/CVE-2026-50266
[Other]https://launchpad.net/bugs/2152115
[Other]https://review.opendev.org/990273
[Other]https://review.opendev.org/990353
[Other]https://review.opendev.org/990356
[Other]https://www.openwall.com/lists/oss-security/2026/06/04/6
[Other]https://bugs.launchpad.net/neutron/+bug/2152115

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