# CVE-2026-50266: neutron: In OpenStack Neutron before 28.0.1, a project manager can create or update a port on a shared network owned by anothe...

CVE-2026-50266 is fixed in neutron on 1 platform, first by DEBIAN-CVE-2026-50266, released June 24, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2026-50266
- Priority: Routine
- CVSS: 2.2 (low)
- EPSS: 0.0026
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Jun 4, 2026

## 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).

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | neutron Debian 13.5 (trixie) | 2:26.0.3-0+deb13u2 | [DEBIAN-CVE-2026-50266](https://patchblox.com/security/data/fix/linux/debian-cve-2026-50266.md) | Jun 24, 2026 |
| Linux | neutron Debian 14 | 2:28.0.0-7 | [DEBIAN-CVE-2026-50266](https://patchblox.com/security/data/fix/linux/debian-cve-2026-50266.md) | Jun 24, 2026 |

---

Data as of 2026-11-08T19:12:23Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

Free to use with attribution: show "Data: Patchblox Patch Radar" with a link to https://patchblox.com/security/patch-radar. Terms, including what needs a written agreement: https://patchblox.com/security/patch-radar/use-the-data

Product names, logos and trademarks shown on Patch Radar belong to their respective owners. They are used only to identify the software each security fix applies to and to help readers find their platform. Their use does not imply any affiliation with, or endorsement by, those owners, and Patchblox is not affiliated with any of them.