{"id":"UBUNTU-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":"2026-06-30T18:18:10.032527905Z","published":"2026-05-28T19:16:00Z","related":["USN-8433-1"],"upstream":["CVE-2026-42999"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-42999"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-42999"},{"type":"REPORT","url":"https://bugs.launchpad.net/keystone/+bug/2148398"},{"type":"REPORT","url":"https://security.openstack.org/ossa/OSSA-2026-015.html"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-8433-1"}],"affected":[{"package":{"name":"keystone","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/keystone?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2:8.0.0-0ubuntu1","2:9.0.0~b1-0ubuntu1","2:9.0.0~b2-0ubuntu1","2:9.0.0~b3-0ubuntu1","2:9.0.0~rc1-0ubuntu1","2:9.0.0-0ubuntu1","2:9.0.2-0ubuntu1","2:9.0.2-0ubuntu2","2:9.1.0-0ubuntu1","2:9.2.0-0ubuntu1","2:9.3.0-0ubuntu1","2:9.3.0-0ubuntu2","2:9.3.0-0ubuntu3","2:9.3.0-0ubuntu3.1","2:9.3.0-0ubuntu3.2"],"ecosystem_specific":{"binaries":[{"binary_name":"keystone","binary_version":"2:9.3.0-0ubuntu3.2"},{"binary_version":"2:9.3.0-0ubuntu3.2","binary_name":"python-keystone"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-42999.json"}},{"package":{"name":"keystone","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/keystone?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2:12.0.0-0ubuntu1","2:13.0.0~b1-0ubuntu1","2:13.0.0~b2-0ubuntu1","2:13.0.0~b3-0ubuntu1","2:13.0.0~rc1-0ubuntu1","2:13.0.0~rc2-0ubuntu1","2:13.0.0-0ubuntu1","2:13.0.1-0ubuntu1","2:13.0.2-0ubuntu1","2:13.0.2-0ubuntu3","2:13.0.4-0ubuntu1"],"ecosystem_specific":{"binaries":[{"binary_version":"2:13.0.4-0ubuntu1","binary_name":"keystone"},{"binary_name":"python-keystone","binary_version":"2:13.0.4-0ubuntu1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-42999.json"}},{"package":{"name":"keystone","ecosystem":"Ubuntu:Pro:20.04:LTS","purl":"pkg:deb/ubuntu/keystone?arch=source&distro=esm-infra%2Ffocal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2:16.0.0-0ubuntu1","2:17.0.0~b1~git2019121613.db81fee63-0ubuntu1","2:17.0.0~b2~git2020020513.99733f172-0ubuntu1","2:17.0.0~b3~git2020032415.9f9040257-0ubuntu1","2:17.0.0~b3~git2020032415.9f9040257-0ubuntu2","2:17.0.0~b3~git2020041013.7bb6314e4-0ubuntu1","2:17.0.0-0ubuntu0.20.04.1","2:17.0.1-0ubuntu1","2:17.0.1-0ubuntu2","2:17.0.1-0ubuntu2+esm1"],"ecosystem_specific":{"binaries":[{"binary_name":"keystone","binary_version":"2:17.0.1-0ubuntu2+esm1"},{"binary_name":"keystone-common","binary_version":"2:17.0.1-0ubuntu2+esm1"},{"binary_name":"python3-keystone","binary_version":"2:17.0.1-0ubuntu2+esm1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-42999.json"}},{"package":{"name":"keystone","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/keystone?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2:21.0.1-0ubuntu2.4"}]}],"versions":["2:20.0.0-0ubuntu1","2:20.0.0+git2021120815.2ddf8f321-0ubuntu1","2:20.0.0+git2022011217.771c943ad-0ubuntu1","2:20.0.0+git2022030313.a3fc9e7c3-0ubuntu1","2:21.0.0-0ubuntu1","2:21.0.1-0ubuntu1","2:21.0.1-0ubuntu2","2:21.0.1-0ubuntu2.1","2:21.0.1-0ubuntu2.2"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_name":"keystone","binary_version":"2:21.0.1-0ubuntu2.4"},{"binary_name":"keystone-common","binary_version":"2:21.0.1-0ubuntu2.4"},{"binary_name":"python3-keystone","binary_version":"2:21.0.1-0ubuntu2.4"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-42999.json"}},{"package":{"name":"keystone","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/keystone?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2:25.0.0-0ubuntu1.4"}]}],"versions":["2:24.0.0-0ubuntu1","2:24.0.0+git2024011916.adfa92b4-0ubuntu1","2:25.0.0~rc1-0ubuntu1","2:25.0.0-0ubuntu1","2:25.0.0-0ubuntu1.1","2:25.0.0-0ubuntu1.2"],"ecosystem_specific":{"binaries":[{"binary_version":"2:25.0.0-0ubuntu1.4","binary_name":"keystone"},{"binary_name":"keystone-common","binary_version":"2:25.0.0-0ubuntu1.4"},{"binary_name":"python3-keystone","binary_version":"2:25.0.0-0ubuntu1.4"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-42999.json"}},{"package":{"name":"keystone","ecosystem":"Ubuntu:25.10","purl":"pkg:deb/ubuntu/keystone?arch=source&distro=questing"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2:28.0.0-0ubuntu1.3"}]}],"versions":["2:27.0.0-0ubuntu1","2:27.0.0+git2025080113.e066e18ab-0ubuntu1","2:28.0.0~rc1-0ubuntu1","2:28.0.0-0ubuntu1","2:28.0.0-0ubuntu1.1"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_name":"keystone","binary_version":"2:28.0.0-0ubuntu1.3"},{"binary_name":"keystone-common","binary_version":"2:28.0.0-0ubuntu1.3"},{"binary_name":"python3-keystone","binary_version":"2:28.0.0-0ubuntu1.3"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-42999.json"}},{"package":{"name":"keystone","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/keystone?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2:29.0.0-0ubuntu1.2"}]}],"versions":["2:28.0.0-0ubuntu1","2:28.0.0-0ubuntu2","2:28.0.0+git20260119.61.8a42793e7-0ubuntu1","2:29.0.0~rc1-0ubuntu1","2:29.0.0-0ubuntu1"],"ecosystem_specific":{"binaries":[{"binary_name":"keystone","binary_version":"2:29.0.0-0ubuntu1.2"},{"binary_version":"2:29.0.0-0ubuntu1.2","binary_name":"keystone-common"},{"binary_name":"python3-keystone","binary_version":"2:29.0.0-0ubuntu1.2"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-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"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"},{"type":"Ubuntu","score":"medium"}]}