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.
CVE-2026-104048
CVSS base score
6.8 (v3.1)
Severity
MEDIUM
Attack vector
Network
Weakness
CWE-1025
Last modified
November 5, 2026
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N
Affected products
fedoraproject sssd
redhat openshift container platform
redhat enterprise linux
References
- access.redhat.com Issue Tracking, Vendor Advisory
- bugzilla.redhat.com Exploit, Issue Tracking, Mitigation
- bugzilla.redhat.com Exploit, Issue Tracking, Mitigation