{"id":"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).","aliases":["GHSA-2r23-2g6v-2m5f","PYSEC-2026-600"],"modified":"2026-07-08T08:13:26.807163108Z","published":"2026-05-28T00:00:00Z","related":["CGA-8349-j6v3-qw75"],"database_specific":{"cna_assigner":"mitre","unresolved_ranges":[{"source":"AFFECTED_FIELD","extracted_events":[{"introduced":"14.0.0"},{"fixed":"27.0.2"},{"introduced":"28.0.0"},{"fixed":"28.0.2"},{"introduced":"29.0.0"},{"fixed":"29.0.2"}]},{"source":"CPE_FIELD","extracted_events":[{"introduced":"14.0.0"},{"fixed":"27.0.2"},{"introduced":"28.0.0"},{"fixed":"28.0.2"},{"introduced":"29.0.0"},{"fixed":"29.0.2"}]},{"source":"DESCRIPTION","extracted_events":[{"fixed":"29.0.2"}]}],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/42xxx/CVE-2026-42999.json","cwe_ids":["CWE-863"]},"references":[{"type":"WEB","url":"https://bugs.launchpad.net/keystone/+bug/2148398"},{"type":"WEB","url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-42999.json"},{"type":"WEB","url":"https://security.openstack.org/ossa/OSSA-2026-015.html"},{"type":"ADVISORY","url":"https://access.redhat.com/security/cve/CVE-2026-42999"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/42xxx/CVE-2026-42999.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-42999"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2482840"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/openstack/keystone","events":[{"introduced":"c767e254979c96858a81cc4bbe8d9773d4dd539b"},{"fixed":"b896b71557ce8370c442fe05818a74d7a9a623a8"},{"introduced":"a568938e0c967a56ade269c93f42718008487b14"},{"fixed":"3dfbbe7b9bd11dcd64420da0e4eda48b637f4a70"},{"introduced":"3526925ae34a66e626bec985628a421a7694168e"},{"fixed":"7b9f39226744b8db50a6d702cc5f715fc9c17f37"}],"database_specific":{"source":"CPE_RANGE","cpe":"cpe:2.3:a:openstack:keystone:*:*:*:*:*:*:*:*","extracted_events":[{"introduced":"14.0.0"},{"fixed":"27.0.2"},{"introduced":"28.0.0"},{"fixed":"28.0.2"},{"introduced":"29.0.0"},{"fixed":"29.0.2"}]}}],"versions":["29.0.1","28.0.1","29.0.0.0rc1","29.0.0","28.0.0.0rc1","28.0.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-42999.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:L/A:L"}]}