CVE-2026-42999
MEDIUMCVSS v3.1: 6.0 · EPSS: 0.0003 (10.4 percentile)
Source data as of:
At a glance
- Severity
- MEDIUM
- CVSS
- 6.0 v3.1 · NVD
- EPSS
- 0.0003 (10.4 percentile) · FIRST.org
- CISA KEV
- No
- Type
- Incorrect Authorization · NVD CWE
- Attack conditions (CVSS vector)
- NetworkNo user interaction · Source: NVD Vector
- Affected vendors
- openstack
- Published
- 2026-05-28 · Modified: 2026-06-02
- References
- Jump to references (2)
CVSS / EPSS / KEV
Source — CVSS: NVD · EPSS: FIRST.org · KEV: CISA. Data & Sources
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).
References
Reference URLs as listed by NVD, grouped by a mechanical match on the link's host/pattern. Labels describe the link type only.