CVE-2026-104048

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.

CVSS 3.1

8.1CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

EPSS

0.3% chance of exploitation in the next 30 days; higher than 22% of CVEs (scores of 2026-10-25)

CWE

CWE-1025

Published

2026-10-06

Modified

2026-10-09

Record from

the NVD, synced 2026-10-19

Affected

• fedoraproject:sssd
• redhat:enterprise_linux
• redhat:openshift_container_platform

References

• https://access.redhat.com/security/cve/CVE-2026-104048
• https://bugzilla.redhat.com/show_bug.cgi?id=2478613
• https://bugzilla.redhat.com/show_bug.cgi?id=2478613

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