CVE-2026-50266

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Source
https://cve.org/CVERecord?id=CVE-2026-50266
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-50266.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-50266
Downstream
Published
2026-06-04T16:18:39.167Z
Modified
2026-07-08T08:13:41.408294462Z
Severity
  • 2.2 (Low) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:L/A:N CVSS Calculator
Summary
[none]
Details

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 deviceowner to a value that has "network:" at the beginning ("network:dhcp" for example). The default port RBAC policies incorrectly included PROJECTMANAGER 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).

Database specific 
{
    "unresolved_ranges": [
        {
            "source": "AFFECTED_FIELD",
            "extracted_events": [
                {
                    "introduced": "25.0.0"
                },
                {
                    "fixed": "25.2.4"
                }
            ]
        }
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/50xxx/CVE-2026-50266.json",
    "cna_assigner": "mitre",
    "cwe_ids": [
        "CWE-863"
    ]
}
References

Affected packages

Git / opendev.org/openstack/neutron

Affected ranges

Type
GIT
Repo
https://opendev.org/openstack/neutron
Events
Introduced
96a445dee8363976333aed121358a4b86f9428e0
Fixed
68346f102f34be9345e8e590b68622101a9c4922
Introduced
46f4ef447537d80bff2bb64da6a61fff40e8fcc3
Fixed
6e846c1a2d5ad40f767e87b6c8ddb14b509ba5d7
Introduced
eb9dd526a3c4ba0ffbb69d06cc387c86ca755d42
Fixed
8d11b5e2fd0f72840fc827ffe4ab4f3fa89221d0
Database specific 
{
    "source": "AFFECTED_FIELD",
    "extracted_events": [
        {
            "introduced": "26.0.0"
        },
        {
            "fixed": "26.0.4"
        },
        {
            "introduced": "27.0.0"
        },
        {
            "fixed": "27.0.3"
        },
        {
            "introduced": "28.0.0"
        },
        {
            "fixed": "28.0.1"
        }
    ]
}

Affected versions

26.*
26.0.0
26.0.0.0rc2
26.0.1
26.0.2
26.0.3
27.*
27.0.0
27.0.0.0rc1
27.0.1
27.0.2
28.*
28.0.0
28.0.0.0rc2

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-50266.json"