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CVE-2026-50266

2.2 · LOW

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 (…

Published Jun 4, 2026CWE-863EPSS 0.38%

Overview

CVE-2026-50266 is a low-severity vulnerability. It was published on June 4, 2026 and has a CVSS 3.1 base score of 2.2 (LOW).

This vulnerability has a CVSS 3.1 base score of 2.2, rated LOW. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

Technical 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).

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Reflaunchpad.net/bugs/2152115Refreview.opendev.org/990273Refreview.opendev.org/990353Refreview.opendev.org/990356Refwww.openwall.com/lists/oss-security/2026/06/04/6Refbugs.launchpad.net/neutron/+bug/2152115

How CyberStrike helps

Frequently asked questions

What is CVE-2026-50266?

CVE-2026-50266 is a low-severity vulnerability. It was published on June 4, 2026 and has a CVSS 3.1 base score of 2.2 (LOW).

How severe is CVE-2026-50266?

This vulnerability has a CVSS 3.1 base score of 2.2, rated LOW. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2026-50266?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-50266?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-50266 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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