PT-2026-46270 · Openstack · Neutron

Tim Shephardon · Published 2026-06-04 · Updated 2026-06-04 · CVE-2026-50266

Mitre

CVSS v3.1

2.2

Low

Base vector

AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:L/A:N

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).

Exploit

Fix

Incorrect Authorization

Weakness Enumeration

CWE-863

Related Identifiers

CVE-2026-50266

Affected Products

Neutron

References · 7

• 🔥 https://bugs.launchpad.net/neutron/+bug/2152115 · Exploit
• https://review.opendev.org/990273 · Patch
• https://review.opendev.org/990353 · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2026-50266 · Security Note
• https://review.opendev.org/990356 · Patch
• https://openwall.com/lists/oss-security/2026/06/04/6 · Note
• https://launchpad.net/bugs/2152115 · Note