Reference page — cumulative record through Monday, October 19, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.
CVE-2026-104048
Red Hat Red Hat Enterprise Linux 10 — Sssd: sssd: authorization bypass via cross-domain username collision in hbac evaluation
AV AC PR UI S C I A CVSS EPSS %ile KEV
N L L N U H H N 8.1 .0028 18.8 —
AFFECTED
Product Versions Fixed
Red Hat Enterprise Linux 10 unspecified —
Red Hat Enterprise Linux 6 unspecified —
Red Hat Enterprise Linux 7 unspecified —
Red Hat Enterprise Linux 8 unspecified —
Red Hat Enterprise Linux 9 unspecified —
Red Hat OpenShift Container Platform 4 unspecified —
Red Hat OpenShift Container Platform 4 unspecified —
TIMELINE
Oct 1 Reserved by redhat
Oct 6 Published (CNA: redhat)
Oct 9 EXPLOIT PUBLISHED — CVE-2026-104048 (Red Hat Enterprise Linux 10). Public exploit reference added.
Oct 9 RESCORED — CVE-2026-104048 (Red Hat Enterprise Linux 10). CVSS 6.8 → 8.1 (NVD).
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.
Lifecycle
Complete event history — 4 events, chronological
| Date | Event | Detail |
|---|
| October 1, 2026 | Reserved | Reserved by redhat |
| October 6, 2026 | Published | Published (CNA: redhat) |
| October 9, 2026 | EXPLOIT PUBLISHED | EXPLOIT PUBLISHED — CVE-2026-104048 (Red Hat Enterprise Linux 10). Public exploit reference added. |
| October 9, 2026 | RESCORED | RESCORED — CVE-2026-104048 (Red Hat Enterprise Linux 10). CVSS 6.8 → 8.1 (NVD). |
Affected
Affected products and packages — 7 rows
| Vendor | Product / Package | Ecosystem | Version introduced | Fixed |
|---|
| Red Hat | Red Hat Enterprise Linux 10 | — | — | — |
| Red Hat | Red Hat Enterprise Linux 6 | — | — | — |
| Red Hat | Red Hat Enterprise Linux 7 | — | — | — |
| Red Hat | Red Hat Enterprise Linux 8 | — | — | — |
| Red Hat | Red Hat Enterprise Linux 9 | — | — | — |
| Red Hat | Red Hat OpenShift Container Platform 4 | — | — | — |
| Red Hat | Red Hat OpenShift Container Platform 4 | — | — | — |
About this page
This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-104048 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Monday, October 19, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.
