CVE-2026-42998

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{"bugzilla": {"description": "openstack-keystone: OpenStack Keystone: User impersonation and unauthorized access via insufficient application credential verification.", "id": "2482825", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2482825"}, "csaw": false, "cvss3": {"cvss3_base_score": "4.9", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:L/A:N", "status": "draft"}, "cwe": "CWE-303", "details": ["A flaw was found in OpenStack Keystone. The application credential authentication plugin fails to verify if the user provided in an authentication request matches the owner of the application credential. This allows a remote attacker to authenticate with their own credentials while impersonating another user, gaining unauthorized access to project-scoped resources and potentially evading audits. The attacker can read the victim's credentials and act as the victim within shared projects."], "name": "CVE-2026-42998", "package_state": [{"cpe": "cpe:/a:redhat:openstack:13", "fix_state": "Under investigation", "package_name": "rhosp13/openstack-keystone", "product_name": "Red Hat OpenStack Platform 13 (Queens)"}, {"cpe": "cpe:/a:redhat:openstack:16.2", "fix_state": "Under investigation", "package_name": "openstack-keystone", "product_name": "Red Hat OpenStack Platform 16.2"}, {"cpe": "cpe:/a:redhat:openstack:16.2", "fix_state": "Under investigation", "package_name": "rhosp-rhel8/openstack-keystone", "product_name": "Red Hat OpenStack Platform 16.2"}, {"cpe": "cpe:/a:redhat:openstack:17.1", "fix_state": "Under investigation", "package_name": "openstack-keystone", "product_name": "Red Hat OpenStack Platform 17.1"}, {"cpe": "cpe:/a:redhat:openstack:17.1", "fix_state": "Under investigation", "package_name": "rhosp-rhel9/openstack-keystone", "product_name": "Red Hat OpenStack Platform 17.1"}, {"cpe": "cpe:/a:redhat:openstack:18.0", "fix_state": "Under investigation", "package_name": "openstack-keystone", "product_name": "Red Hat OpenStack Platform 18.0"}, {"cpe": "cpe:/a:redhat:openstack:18.0", "fix_state": "Under investigation", "package_name": "rhoso/openstack-keystone-rhel9", "product_name": "Red Hat OpenStack Platform 18.0"}], "public_date": "2026-05-28T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-42998\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-42998\nhttps://bugs.launchpad.net/keystone/+bug/2148477\nhttps://security.openstack.org/ossa/OSSA-2026-015.html"], "statement": "This MODERATE impersonation vulnerability in Keystone's application credential plugin allows authenticated users to obtain tokens attributed to other users. Exploitation requires high complexity (valid app credentials and shared project context). Impact is limited to the intersection of attacker's app credential roles and victim's actual project roles. Affects versions before 29.0.2.", "threat_severity": "Moderate"}

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