CVE-2026-42999

Full vulnerability record from the local CVENow database.
Description

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).
Severity
HIGH
CVSS score
8.8 (v3.1)
Vulnerability status
Modified
Source identifier
[email protected]
Published
2026-05-28 19:16:37.630000
Last modified
2026-10-26 13:10:00.140000
View original CVE JSON
{
  "id": "CVE-2026-42999",
  "sourceIdentifier": "[email protected]",
  "published": "2026-05-28T19:16:37.630",
  "lastModified": "2026-10-26T13:10:00.140",
  "vulnStatus": "Modified",
  "cveTags": [],
  "descriptions": [
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      "lang": "en",
      "value": "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)."
    },
    {
      "lang": "es",
      "value": "Se descubrió un problema en OpenStack Keystone antes de la versión 29.0.2. El aplicador de políticas RBAC de Keystone en enforce_call fusiona incondicionalmente el cuerpo de la solicitud JSON en bruto en el diccionario de aplicación de políticas a través de policy_dict.update(json_input.copy()), sobrescribiendo datos de destino confiables que se habían establecido previamente a partir de búsquedas en la base de datos. Debido a que flask.request.get_json se llama con force=True, esto funciona independientemente del Content-Type o del método HTTP. Cualquier usuario autenticado puede inyectar atributos de destino de política arbitrarios (por ejemplo, user_id, project_id) en el cuerpo de la solicitud para eludir las comprobaciones RBAC y realizar operaciones no autorizadas en recursos que pertenecen a otros usuarios o proyectos. Esto se introdujo en el commit 5ea59f52 (Rocky/14.0.0)."
    }
  ],
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