CVE-2026-49299

openstack-neutron: OpenStack Neutron: Unauthorized tag modification due to policy enforcement mismatch

Published May 28, 2026 CVSS 4.0 · 5.3 Medium EPSS < 1% KEV · Not listed
Description
In OpenStack Neutron before 28.0.1, the tagging controller enforces plural policy action names on single-tag write operations while the defined policy rules use singular names. The mismatched names evaluate as allowed under the default policy, permitting a project reader to create and update tags on same-project resources. Deployments running Neutron 26.0.0 or later are affected.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Github GHSA Github GHSA GHSA-xv24-hxh9-2hh9 OpenStack Neutron has an Incorrect Authorization issue
History
Type Values Removed Values Added
Title Policy Misconfiguration Allows Unauthorized Tag Manipulation in OpenStack Neutron openstack-neutron: OpenStack Neutron: Unauthorized tag modification due to policy enforcement mismatch
Weaknesses CWE-425
References
Metrics threat_severity

None

cvssV3_1

{'score': 4.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N'}

threat_severity

Moderate

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
Title Policy Misconfiguration Allows Unauthorized Tag Manipulation in OpenStack Neutron
Type Values Removed Values Added
Description In OpenStack Neutron before 28.0.1, the tagging controller enforces plural policy action names on single-tag write operations while the defined policy rules use singular names. The mismatched names evaluate as allowed under the default policy, permitting a project reader to create and update tags on same-project resources. Deployments running Neutron 26.0.0 or later are affected.
First Time appeared Openstack
Openstack neutron
Weaknesses CWE-863
CPEs cpe:2.3:a:openstack:neutron:*:*:*:*:*:*:*:*
Vendors & Products Openstack
Openstack neutron
References
Metrics cvssV4_0

{'score': 5.3, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
mitre
Published
Updated
Jun 2, 2026, 5:33 PM
Reserved
May 28, 2026, 9:53 PM
Status
Deferred
Published
May 28, 2026, 10:17 PM
Modified
Jul 21, 2026, 10:10 AM
Severity
Moderate
Public date
May 28, 2026, 9:53 PM