{"id":"CVE-2016-4911","details":"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 restrictions by rescoping a token.","aliases":["GHSA-f82m-w3p3-cgp3","PYSEC-2016-38"],"modified":"2026-03-15T22:08:15.381761Z","published":"2016-06-13T14:59:07.323Z","references":[{"type":"ADVISORY","url":"http://www.securityfocus.com/bid/90728"},{"type":"ADVISORY","url":"https://bugs.launchpad.net/keystone/+bug/1577558"},{"type":"ADVISORY","url":"https://review.openstack.org/#/c/311886/"},{"type":"FIX","url":"https://security.openstack.org/ossa/OSSA-2016-008.html"},{"type":"ARTICLE","url":"http://www.openwall.com/lists/oss-security/2016/05/17/10"},{"type":"ARTICLE","url":"http://www.openwall.com/lists/oss-security/2016/05/17/11"}],"affected":[{"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2016-4911.json","unresolved_ranges":[{"events":[{"introduced":"0"},{"last_affected":"9.0.0.0-rc1"}]},{"events":[{"introduced":"0"},{"last_affected":"9.0.0.0-rc2"}]},{"events":[{"introduced":"0"},{"last_affected":"9.0.0.0-rc3"}]}]}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N"}]}