{"cve":"CVE-2026-42999","nvd":{"published":"2026-05-28T19:16:37.630","modified":"2026-10-26T13:10:00.140","status":"Modified","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_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","score":8.8},"cwes":["CWE-863","CWE-639"],"references":["https://bugs.launchpad.net/keystone/+bug/2148398","https://security.openstack.org/ossa/OSSA-2026-015.html","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"],"products":["openstack:keystone"],"source":"nvd","synced_at":"2026-10-26T13:39:24.642594360+00:00"},"epss":{"cve":"CVE-2026-42999","score":0.00329,"percentile":0.25848,"date":"2026-10-25"},"kev":null,"osv":[{"id":"GHSA-2r23-2g6v-2m5f","url":"https://osv.dev/vulnerability/GHSA-2r23-2g6v-2m5f","summary":"OpenStack Keystone has an Authorization Bypass","modified":"2026-09-10T03:51:04.100486004Z","packages":[{"ecosystem":"PyPI","name":"keystone","purl":"pkg:pypi/keystone","ranges":[">=14.0.0 <27.0.2"],"fixed":["27.0.2"]},{"ecosystem":"PyPI","name":"keystone","purl":"pkg:pypi/keystone","ranges":[">=28.0.0 <28.0.2"],"fixed":["28.0.2"]},{"ecosystem":"PyPI","name":"keystone","purl":"pkg:pypi/keystone","ranges":[">=29.0.0 <29.0.2"],"fixed":["29.0.2"]}]},{"id":"PYSEC-2026-600","url":"https://osv.dev/vulnerability/PYSEC-2026-600","summary":"","modified":"2026-07-13T16:45:04.870559314Z","packages":[{"ecosystem":"PyPI","name":"keystone","purl":"pkg:pypi/keystone","ranges":[">=14.0.0 <27.0.2",">=28.0.0 <28.0.2",">=29.0.0 <29.0.2"],"fixed":["27.0.2","28.0.2","29.0.2"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}