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Vulnerability record · CVE-2026-42999 · published 28 May 2026

CVE-2026-42999: Openstack keystone incorrect authorization vulnerability

Openstack · Keystone

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).

8.8 CVSS 3.1 High EPSS 0.42% · top 65.8% CWE-863 · Incorrect authorizationCWE-639 · Insecure direct object reference
8.8CVSS 3.1 base score
0.42%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
5References, 1 tagged exploit
23 Jul 2026Last modified by NVD

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).

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://bugs.launchpad.net/keystone/+bug/2148398 ExploitIssue TrackingPatchThird Party Advisory
https://security.openstack.org/ossa/OSSA-2026-015.html PatchVendor Advisory
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

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2026-42999), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.