{"id":"UBUNTU-CVE-2026-49299","details":"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.","modified":"2026-09-02T13:15:03.141748081Z","published":"2026-05-28T22:17:00Z","upstream":["CVE-2026-49299"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-49299"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-49299"},{"type":"REPORT","url":"https://security.openstack.org/ossa/OSSA-2026-016.html"},{"type":"REPORT","url":"https://bugs.launchpad.net/bugs/2150132"},{"type":"REPORT","url":"https://review.opendev.org/c/openstack/neutron/+/989099"},{"type":"REPORT","url":"https://www.openwall.com/lists/oss-security/2026/05/28/8"}],"affected":[{"package":{"name":"neutron","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/neutron?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2:7.0.0-0ubuntu1","2:8.0.0~b1-0ubuntu2","2:8.0.0~b2-0ubuntu4","2:8.0.0~b2-0ubuntu5","2:8.0.0~b2-0ubuntu7","2:8.0.0~b3-0ubuntu1","2:8.0.0~rc1-0ubuntu1","2:8.0.0-0ubuntu1","2:8.1.0-0ubuntu0.16.04.2","2:8.1.2-0ubuntu1","2:8.2.0-0ubuntu1","2:8.3.0-0ubuntu1","2:8.3.0-0ubuntu1.1","2:8.3.0-0ubuntu1.2","2:8.4.0-0ubuntu1","2:8.4.0-0ubuntu2","2:8.4.0-0ubuntu3","2:8.4.0-0ubuntu4","2:8.4.0-0ubuntu5","2:8.4.0-0ubuntu6","2:8.4.0-0ubuntu7.1","2:8.4.0-0ubuntu7.2","2:8.4.0-0ubuntu7.3","2:8.4.0-0ubuntu7.4","2:8.4.0-0ubuntu7.5"],"ecosystem_specific":{"binaries":[{"binary_name":"neutron-bgp-dragent","binary_version":"2:8.4.0-0ubuntu7.5"},{"binary_version":"2:8.4.0-0ubuntu7.5","binary_name":"neutron-common"},{"binary_name":"neutron-dhcp-agent","binary_version":"2:8.4.0-0ubuntu7.5"},{"binary_name":"neutron-l3-agent","binary_version":"2:8.4.0-0ubuntu7.5"},{"binary_version":"2:8.4.0-0ubuntu7.5","binary_name":"neutron-linuxbridge-agent"},{"binary_version":"2:8.4.0-0ubuntu7.5","binary_name":"neutron-macvtap-agent"},{"binary_version":"2:8.4.0-0ubuntu7.5","binary_name":"neutron-metadata-agent"},{"binary_name":"neutron-metering-agent","binary_version":"2:8.4.0-0ubuntu7.5"},{"binary_version":"2:8.4.0-0ubuntu7.5","binary_name":"neutron-openvswitch-agent"},{"binary_name":"neutron-plugin-linuxbridge-agent","binary_version":"2:8.4.0-0ubuntu7.5"},{"binary_name":"neutron-plugin-ml2","binary_version":"2:8.4.0-0ubuntu7.5"},{"binary_name":"neutron-plugin-openvswitch-agent","binary_version":"2:8.4.0-0ubuntu7.5"},{"binary_name":"neutron-plugin-sriov-agent","binary_version":"2:8.4.0-0ubuntu7.5"},{"binary_version":"2:8.4.0-0ubuntu7.5","binary_name":"neutron-server"},{"binary_name":"neutron-sriov-agent","binary_version":"2:8.4.0-0ubuntu7.5"},{"binary_version":"2:8.4.0-0ubuntu7.5","binary_name":"python-neutron"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-49299.json"}},{"package":{"name":"neutron","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/neutron?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2:11.0.1-0ubuntu1","2:12.0.0~b1-0ubuntu1","2:12.0.0~b1-0ubuntu2","2:12.0.0~b2-0ubuntu1","2:12.0.0~b3-0ubuntu1","2:12.0.0~rc1-0ubuntu1","2:12.0.0~rc2-0ubuntu1","2:12.0.0-0ubuntu1","2:12.0.0-0ubuntu1.1","2:12.0.0-0ubuntu1.2","2:12.0.0-0ubuntu1.3","2:12.0.0-0ubuntu1.4","2:12.0.0-0ubuntu2","2:12.0.0-0ubuntu3","2:12.0.1-0ubuntu1","2:12.0.1-0ubuntu1.1","2:12.0.2-0ubuntu1","2:12.0.3-0ubuntu1","2:12.0.5-0ubuntu1","2:12.0.5-0ubuntu4","2:12.0.5-0ubuntu5","2:12.0.6-0ubuntu1","2:12.0.6-0ubuntu2","2:12.0.6-0ubuntu3","2:12.1.0-0ubuntu1","2:12.1.1-0ubuntu1","2:12.1.1-0ubuntu2","2:12.1.1-0ubuntu3","2:12.1.1-0ubuntu4","2:12.1.1-0ubuntu7","2:12.1.1-0ubuntu8","2:12.1.1-0ubuntu8.1"],"ecosystem_specific":{"binaries":[{"binary_name":"neutron-common","binary_version":"2:12.1.1-0ubuntu8.1"},{"binary_name":"neutron-dhcp-agent","binary_version":"2:12.1.1-0ubuntu8.1"},{"binary_version":"2:12.1.1-0ubuntu8.1","binary_name":"neutron-l3-agent"},{"binary_version":"2:12.1.1-0ubuntu8.1","binary_name":"neutron-linuxbridge-agent"},{"binary_name":"neutron-macvtap-agent","binary_version":"2:12.1.1-0ubuntu8.1"},{"binary_name":"neutron-metadata-agent","binary_version":"2:12.1.1-0ubuntu8.1"},{"binary_name":"neutron-metering-agent","binary_version":"2:12.1.1-0ubuntu8.1"},{"binary_name":"neutron-openvswitch-agent","binary_version":"2:12.1.1-0ubuntu8.1"},{"binary_name":"neutron-plugin-linuxbridge-agent","binary_version":"2:12.1.1-0ubuntu8.1"},{"binary_name":"neutron-plugin-ml2","binary_version":"2:12.1.1-0ubuntu8.1"},{"binary_name":"neutron-plugin-openvswitch-agent","binary_version":"2:12.1.1-0ubuntu8.1"},{"binary_name":"neutron-plugin-sriov-agent","binary_version":"2:12.1.1-0ubuntu8.1"},{"binary_name":"neutron-server","binary_version":"2:12.1.1-0ubuntu8.1"},{"binary_name":"neutron-sriov-agent","binary_version":"2:12.1.1-0ubuntu8.1"},{"binary_name":"python-neutron","binary_version":"2:12.1.1-0ubuntu8.1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-49299.json"}},{"package":{"name":"neutron","ecosystem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