{"action":"Upgrade neutron to 16.4.1 or later.","affected":[{"fixed":"16.4.1","introduced":"0"},{"fixed":"17.2.1","introduced":"17.0.0"},{"fixed":"18.1.1","introduced":"18.0.0"}],"component":"neutron","cve_ids":["CVE-2021-40797"],"ecosystem":"PyPI","epss":0.01774,"exploited":false,"fixed_versions":["16.4.1","17.2.1","18.1.1"],"ghsa_id":"GHSA-cpx3-696p-3cw9","id":"tcs_01M5KGCD5MDY7NECXA7SY3CQNA","modified_at":"2026-06-10T17:02:23.751801879Z","published_at":"2021-09-08T20:15:00Z","references":["https://osv.dev/vulnerability/PYSEC-2021-329","https://launchpad.net/bugs/1942179","https://security.openstack.org/ossa/OSSA-2021-006.html","http://www.openwall.com/lists/oss-security/2021/09/09/2","https://github.com/advisories/GHSA-cpx3-696p-3cw9"],"severity":{"label":"unknown"},"sources":[{"source":"osv","source_id":"PYSEC-2021-329","url":"https://osv.dev/vulnerability/PYSEC-2021-329"}],"summary":"An issue was discovered in the routes middleware in OpenStack Neutron before 16.4.1, 17.x before 17.2.1, and 18.x before 18.1.1. By making API requests involving nonexistent controllers, an authentica"}