What is CVE-2026-104048?

CVE-2026-104048 is a medium-severity vulnerability in Red Hat Enterprise Linux 10, classified under CWE-1025. CVSS score: 6.8/10. Published 2026-10-06.

How severe is CVE-2026-104048?

Medium severity. CVSS v3 base score is 6.8 out of 10.

Vulnerability in Red Hat Enterprise Linux 10

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.

Published 2026-10-06 · last modified 2026-10-07.

CVSS v3 metric

CVSS v3 base score 6.8 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Weakness classification (CWE)

CWE-1025

References

access.redhat.com/security/cve/CVE-2026-104048 (vdb-entry)
bugzilla.redhat.com/show_bug.cgi (issue-tracking)

Frequently asked questions

What is CVE-2026-104048?: CVE-2026-104048 is a medium-severity vulnerability in Red Hat Enterprise Linux 10, classified under CWE-1025. CVSS score: 6.8/10. Published 2026-10-06.
How severe is CVE-2026-104048?: Medium severity. CVSS v3 base score is 6.8 out of 10.