cbcvebase.
CVE-2026-42999
published 2026-05-28

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…

PriorityP355high8.8CVSS 3.1
AVNACLPRLUINSUCHIHAH
EPSS
0.33%
24.7th percentile
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).

Affected

8 ranges
VendorProductVersion rangeFixed in
openstackkeystone>= 14.0.0 < 27.0.227.0.2
openstackkeystone>= 28.0.0 < 28.0.228.0.2
openstackkeystone>= 29.0.0 < 29.0.229.0.2
rhosoopenstack-keystone-rhel9——
rhosp-rhel8openstack-keystone——
rhosp-rhel9openstack-keystone——
rhosp13openstack-keystone——
ubuntukeystone——

CVSS provenance

nvdv3.18.8HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
vendor_redhat8.8HIGH
vendor_ubuntu5.3MEDIUM
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