8.8

CVE-2026-42999

Exploit
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).
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Openstack ≫ Keystone Version >= 14.0.0 < 27.0.2
Openstack ≫ Keystone Version >= 28.0.0 < 28.0.2
Openstack ≫ Keystone Version >= 29.0.0 < 29.0.2
VulnDex Vulnerability Enrichment
Diese Information steht angemeldeten Benutzern zur Verfügung. Login Login
Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.33% 0.247
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
nvd@nist.gov 8.8 2.8 5.9
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
cve@mitre.org 6 1.8 3.7
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:L/A:L
0b0ca135-0b70-47e7-9f44-1890c2a1c46c 8.3 2.8 5.5
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L
CWE-639 Authorization Bypass Through User-Controlled Key

The system's authorization functionality does not prevent one user from gaining access to another user's data or record by modifying the key value identifying the data.

CWE-863 Incorrect Authorization

The product performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check.

https://security.openstack.org/ossa/OSSA-2026-015.html
Patch
Vendor Advisory
https://bugs.launchpad.net/keystone/+bug/2148398
Patch
Third Party Advisory
Exploit
Issue Tracking
https://access.redhat.com/security/cve/CVE-2026-42999
https://bugzilla.redhat.com/show_bug.cgi?id=2482840
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-42999.json