CVE-2026-42999
Publication date 28 May 2026
Last updated 18 June 2026
Ubuntu priority
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).
Status
| Package | Ubuntu Release | Status |
|---|---|---|
| keystone | 26.04 LTS resolute |
Fixed 2:29.0.0-0ubuntu1.2
|
| 25.10 questing |
Fixed 2:28.0.0-0ubuntu1.3
|
|
| 24.04 LTS noble |
Fixed 2:25.0.0-0ubuntu1.4
|
|
| 22.04 LTS jammy |
Fixed 2:21.0.1-0ubuntu2.4
|
|
| 20.04 LTS focal |
Needs evaluation
|
|
| 18.04 LTS bionic |
Needs evaluation
|
|
| 16.04 LTS xenial |
Needs evaluation
|
Severity score breakdown
CVSS version: CVSS v3.0
Base score
6.0 · Medium
Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:L/A:L
References
Related Ubuntu Security Notices (USN)
- USN-8433-1
- OpenStack Keystone vulnerabilities
- 16 June 2026