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).
- CVSS 3.1
- 8.8
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - EPSS
- 0.3% chance of exploitation in the next 30 days; higher than 25% of CVEs (scores of 2026-10-25)
- CWEs
- CWE-863, CWE-639
- Published
- Modified
- Record from
- the NVD, synced
Affected
- openstack:keystone
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-2r23-2g6v-2m5f | PyPI | keystone | >=14.0.0 <27.0.2 | 27.0.2 |
| GHSA-2r23-2g6v-2m5f | PyPI | keystone | >=28.0.0 <28.0.2 | 28.0.2 |
| GHSA-2r23-2g6v-2m5f | PyPI | keystone | >=29.0.0 <29.0.2 | 29.0.2 |
| PYSEC-2026-600 | PyPI | keystone | >=14.0.0 <27.0.2 >=28.0.0 <28.0.2 >=29.0.0 <29.0.2 | 27.0.2, 28.0.2, 29.0.2 |