Incorrect Authorization Affecting neutron package, versions <2:26.0.3-0+deb13u2


Severity

Recommended
low

Based on default assessment until relevant scores are available.

Threat Intelligence

EPSS
0.26% (18th percentile)

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  • Snyk IDSNYK-DEBIAN13-NEUTRON-17167977
  • published5 Jun 2026
  • disclosed4 Jun 2026

Introduced: 4 Jun 2026

CVE-2026-50266  (opens in a new tab)
CWE-863  (opens in a new tab)

How to fix?

Upgrade Debian:13 neutron to version 2:26.0.3-0+deb13u2 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream neutron package and not the neutron package as distributed by Debian. See How to fix? for Debian:13 relevant fixed versions and status.

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 Base Scores

version 3.1