CVE-2026-50266

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Summary

CVECVE-2026-50266
StatePUBLISHED
Assignermitre
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-06-04 17:16:33 UTC
Updated2026-06-04 18:16:32 UTC
DescriptionIn 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).

Risk And Classification

Primary CVSS: v3.1 2.2 LOW from [email protected]

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

Problem Types: CWE-863 | CWE-863 CWE-863 Incorrect Authorization

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary2.2LOWCVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:L/A:N
3.1CNACVSS2.2LOWCVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:L/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
High
Privileges Required
High
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
Low
Availability
None

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA OpenStack Neutron affected 25.0.0 25.2.4 semver Not specified
CNA OpenStack Neutron affected 26.0.0 26.0.4 semver Not specified
CNA OpenStack Neutron affected 27.0.0 27.0.3 semver Not specified
CNA OpenStack Neutron affected 28.0.0 28.0.1 semver Not specified

References

ReferenceSourceLinkTags
launchpad.net/bugs/2152115 [email protected] launchpad.net
review.opendev.org/990273 [email protected] review.opendev.org
review.opendev.org/990353 [email protected] review.opendev.org
bugs.launchpad.net/neutron/+bug/2152115 134c704f-9b21-4f2e-91b3-4a467353bcc0 bugs.launchpad.net
review.opendev.org/990356 [email protected] review.opendev.org
www.openwall.com/lists/oss-security/2026/06/04/6 [email protected] www.openwall.com
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