Vulnerability Details CVE-2026-42999
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).
Exploit prediction scoring system (EPSS) score
EPSS Score 0.0
EPSS Ranking 12.7%
CVSS Severity
CVSS v3 Score 6.0
References
Products affected by CVE-2026-42999
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cpe:2.3:a:openstack:keystone:*
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cpe:2.3:a:openstack:keystone:14.0.0
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cpe:2.3:a:openstack:keystone:14.0.1
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cpe:2.3:a:openstack:keystone:14.1.0
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cpe:2.3:a:openstack:keystone:15.0.0
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cpe:2.3:a:openstack:keystone:15.0.1
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cpe:2.3:a:openstack:keystone:16.0.0
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cpe:2.3:a:openstack:keystone:16.0.0.0
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cpe:2.3:a:openstack:keystone:16.0.1
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cpe:2.3:a:openstack:keystone:16.0.2
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cpe:2.3:a:openstack:keystone:17.0.0
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cpe:2.3:a:openstack:keystone:17.0.0.0
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cpe:2.3:a:openstack:keystone:17.0.1
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cpe:2.3:a:openstack:keystone:18.0.0
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cpe:2.3:a:openstack:keystone:18.0.0.0
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cpe:2.3:a:openstack:keystone:18.0.1
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cpe:2.3:a:openstack:keystone:19.0.0
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cpe:2.3:a:openstack:keystone:19.0.0.0
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cpe:2.3:a:openstack:keystone:19.0.1