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.
Fix
Patch, vendor advisory and mitigation references on NVD 3
- https://access.redhat.com/security/cve/CVE-2026-104048 Vendor Advisory, Issue Tracking
- https://bugzilla.redhat.com/show_bug.cgi?id=2478613 Exploit, Issue Tracking, Mitigation, Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2478613 Exploit, Issue Tracking, Mitigation, Vendor Advisory
Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.
Change history 1
- First seenCVSS 8.1 · fedoraproject, redhatNVD modified 2026-10-09 12:54
Affected (CPE criteria) 6
cpe:2.3:a:fedoraproject:sssd:2.12.0:*:*:*:*:*:*:*cpe:2.3:a:redhat:openshift_container_platform:4.0:*:*:*:*:*:*:*cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:*cpe:2.3:o:redhat:enterprise_linux:10.0:*:*:*:*:*:*:*
References 3
- https://access.redhat.com/security/cve/CVE-2026-104048 Vendor Advisory, Issue Tracking
- https://bugzilla.redhat.com/show_bug.cgi?id=2478613 Exploit, Issue Tracking, Mitigation, Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2478613 Exploit, Issue Tracking, Mitigation, Vendor Advisory