CVE-2026-104048
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.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.30%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
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
- 8.1 HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
- EPSS
- 0.30% probability · 23th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-1025
- Affected
- fedoraproject/sssd · redhat/openshift container platform · redhat/enterprise linux
- Source
- secalert@redhat.com
EPSS moved from 0.3% on 7 October 2026 to 0.3% on 26 October 2026.
References
- https://access.redhat.com/security/cve/CVE-2026-104048Vendor Advisory, Issue Tracking
- https://bugzilla.redhat.com/show_bug.cgi?id=2478613Exploit, Issue Tracking, Mitigation, Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2478613Exploit, Issue Tracking, Mitigation, Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.