CVE-2026-50266_CVE-2026-50266

2.2 / 10

LOW

CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:L/A:N

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).

Basic Information

ID CVE-2026-50266

Source mitre

Published Jun 4, 2026 at 16:18

Affected Product

Vendor OpenStack

Product Neutron

Version 25.0.0

Affected Versions OpenStack Neutron 25.0.0
OpenStack Neutron 26.0.0
OpenStack Neutron 27.0.0
OpenStack Neutron 28.0.0

CWE Classification

CWE-863

References

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    "published": "2026-06-04T16:18:39.167Z",
    "modified": "2026-06-04T16:18:39.167Z",
    "type": "cve",
    "title": "CVE-2026-50266",
    "source": "mitre",
    "references": "https://launchpad.net/bugs/2152115\nhttps://review.opendev.org/990273\nhttps://review.opendev.org/990353\nhttps://review.opendev.org/990356\nhttps://www.openwall.com/lists/oss-security/2026/06/04/6",
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    "sourceData": "OpenStack Neutron 25.0.0\nOpenStack Neutron 26.0.0\nOpenStack Neutron 27.0.0\nOpenStack Neutron 28.0.0",
    "sourceHref": "",
    "cvss": {
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        "version": "3.1"
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