{"action":"Upgrade keystone to 2:9.0.0-2 or later.","affected":[{"fixed":"2:9.0.0-2","introduced":"0"}],"component":"keystone","cve_ids":[],"ecosystem":"Debian","ecosystem_qualifier":"Debian:12","exploited":false,"fixed_versions":["2:9.0.0-2"],"id":"tcs_01M5NBM4N29K646BYEFRRAS8V2","modified_at":"2026-09-22T07:01:23.779817380Z","published_at":"2016-06-13T14:59:07.323Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2016-4911","https://security-tracker.debian.org/tracker/CVE-2016-4911"],"severity":{"label":"medium","score":4.3},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2016-4911","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2016-4911"}],"summary":"The Fernet Token Provider in OpenStack Identity (Keystone) 9.0.x before 9.0.1 (mitaka) allows remote authenticated users to prevent revocation of a chain of tokens and bypass intended access restricti"}