CVE-2026-104048: Fedoraproject Sssd

High severity, CVSS 8.1. EPSS: 0.3% chance of exploitation in the next 30 days.

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.

Affected products

• Fedoraproject Sssd: version 2.12.0 only
• Red Hat Enterprise Linux: version 7.0 only; version 8.0 only; version 9.0 only; version 10.0 only
• Red Hat Openshift Container Platform: version 4.0 only

Published 2026-10-06. Last modified 2026-10-09.