---
id: CVE-2026-104048
title: A flaw was found in SSSD
summary: >-
  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 doma…
severity: medium
cvss: 6.8
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N'
cwe:
  - CWE-1025
vendor: Red Hat
product: sssd
affected:
  - sssd (all versions)
  - sssd
  - sssd (all versions)
  - sssd (all versions)
  - sssd (all versions)
  - openshift/ose-rhel-coreos-8 (all versions)
  - openshift/ose-rhel-coreos-9 (all versions)
published: '2026-10-06'
updated: '2026-10-06'
sourceUpdated: '2026-10-06T20:17:14.977'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-104048'
references:
  - url: 'https://access.redhat.com/security/cve/CVE-2026-104048'
    label: secalert@redhat.com
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2478613'
    label: secalert@redhat.com
tags:
  - nvd
  - cve.org
ingestedAt: '2026-10-06T20:16:42.489Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.