{"id":"DEBIAN-CVE-2026-42999","details":"An issue was discovered in OpenStack Keystone before 29.0.2. The Keystone RBAC policy enforcer in enforce_call unconditionally merges the raw JSON request body into the policy enforcement dictionary via policy_dict.update(json_input.copy()), overwriting trusted target data that was previously set from database lookups. Because flask.request.get_json is called with force=True, this works regardless of Content-Type or HTTP method. Any authenticated user can inject arbitrary policy target attributes (e.g., user_id, project_id) into the request body to bypass RBAC checks and perform unauthorized operations on resources belonging to other users or projects. This was introduced in commit 5ea59f52 (Rocky/14.0.0).","modified":"2026-09-01T16:06:42.875082820Z","published":"2026-05-28T19:16:37.630Z","upstream":["CVE-2026-42999"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2026-42999"}],"affected":[{"package":{"name":"keystone","ecosystem":"Debian:12","purl":"pkg:deb/debian/keystone?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2:22.0.2-0+deb12u3"}]}],"versions":["2:22.0.0-2","2:22.0.2-0+deb12u1","2:22.0.2-0+deb12u2"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2026-42999.json"}},{"package":{"name":"keystone","ecosystem":"Debian:13","purl":"pkg:deb/debian/keystone?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2:27.0.0-3+deb13u4"}]}],"versions":["2:27.0.0-3","2:27.0.0-3+deb13u1","2:27.0.0-3+deb13u3"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2026-42999.json"}},{"package":{"name":"keystone","ecosystem":"Debian:14","purl":"pkg:deb/debian/keystone?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2:29.0.1-2"}]}],"versions":["2:27.0.0-3","2:28.0.0-1","2:28.0.0-2","2:28.0.0-3","2:28.0.0-4","2:28.0.0-5","2:28.0.0-6","2:28.0.0~rc1-1","2:28.0.0~rc1-2","2:28.0.0~rc1-4","2:29.0.0-1","2:29.0.0-2","2:29.0.0-3","2:29.0.0~rc1-1","2:29.0.0~rc1-2","2:29.0.1-1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2026-42999.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"}]}