{"id":"CVE-2026-104048","summary":"Sssd: sssd: authorization bypass via cross-domain username collision in hbac evaluation","details":"A flaw was found in SSSD. In trust-enabled identity management environments, SSSD evaluates Host-Based Access Control (HBAC) rules by stripping domain qualifiers and comparing only short usernames. An authenticated user in a trusted domain who shares the same username as an authorized local account can bypass access policies and gain unauthorized access to protected services or hosts.","modified":"2026-10-11T02:46:05.897630412Z","published":"2026-10-06T19:34:25.863Z","database_specific":{"cwe_ids":["CWE-1025"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/104xxx/CVE-2026-104048.json","cna_assigner":"redhat"},"references":[{"type":"WEB","url":"https://access.redhat.com/downloads/content/package-browser/"},{"type":"ADVISORY","url":"https://access.redhat.com/security/cve/CVE-2026-104048"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/104xxx/CVE-2026-104048.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-104048"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2478613"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/sssd/sssd","events":[{"introduced":"1a1cf163b78ff4768cc8bfc1e631171bc021e2fe"},{"last_affected":"1a1cf163b78ff4768cc8bfc1e631171bc021e2fe"}],"database_specific":{"extracted_events":[{"introduced":"2.12.0"},{"last_affected":"2.12.0"}],"source":"CPE_STRING","cpe":"cpe:2.3:a:fedoraproject:sssd:2.12.0:*:*:*:*:*:*:*"}}],"versions":["2.12.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-104048.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N"}]}