CVE-2026-104048

HIGHNVD 8.18.1—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 8.1 under NVD CVSS v3. EPSS exploit probability: 0.3% (18th percentile of EPSS-scored CVEs). GitHub Security Advisory enrichment pending alignment with NVD CVSS.

Triggered by: NVD CVSS baseline
Sources: epss, ghsa, nvd
Trending — 5 sources updated this weekElevated
8.1EG
EchelonGraph verdictPlan mitigationSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.3%CVSS: 8.1Exploit: Elevated riskExposed services: Not assessed

No fix is confirmed yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for the fix.

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 v3
8.1
EG Score
8.1HIGHmedium confidence
EG Risk
52
EG Risk 52/100CISA SSVC

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity81% × 45%
Exploitation40% × 40%
Automatability0% × 15%
CISA SSVC: Track at low, Track* at medium and Attend at high mission impact.
Action: No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines at low or medium mission impact and sooner than that at high, and watch the vendor's advisory for the fix.
EPSS PROB
0.3%
EPSS %ILE
18th
KEV
Not listed

CISA SSVCTrack at low, Track* at medium and Attend at high mission impact.

No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines at low or medium mission impact and sooner than that at high, and watch the vendor's advisory for the fix.

Exploitation public PoC (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

October 6, 2026

Last Modified

October 9, 2026

Advisory Details (2)

Auto-updated Oct 6, 2026
No fix on record yet. Sources: redhat.
redhat

2478613 – (CVE-2026-104048) CVE-2026-104048 sssd: sssd: Authorization bypass via cross-domain username collision in HBAC evaluation

https://bugzilla.redhat.com/show_bug.cgi?id=2478613
redhatMentions a patch (unverified)

CVE-2026-104048 - Red Hat Customer Portal

Affected: Red Hat Enterprise Linux 8 or OpenShift Container Platform 4, is affected by this vulnerability and a fix may be released to a

https://access.redhat.com/security/cve/CVE-2026-104048

Vendor Advisories for CVE-2026-104048(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 17× in last 7d / 17× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-10-09 20:06 UTCEPSS rescore
  2. 2026-10-09 13:12 UTCEG score recompute▲ 1.30
  3. 2026-10-09 13:12 UTCGHSA enrichment
  4. 2026-10-09 13:10 UTCNVD updateCVSS v3 → 8.1 · severity → HIGH
  5. 2026-10-08 17:11 UTCEPSS rescore
  6. 2026-10-08 15:14 UTCEG score recompute
  7. 2026-10-08 15:14 UTCGHSA enrichment
  8. 2026-10-07 23:47 UTCEPSS rescore
  9. 2026-10-07 15:31 UTCEG score recompute
  10. 2026-10-07 15:31 UTCGHSA enrichment
  11. 2026-10-07 14:50 UTCEG score recompute
  12. 2026-10-07 14:49 UTCGHSA enrichment
  13. 2026-10-07 14:42 UTCEG score recompute
  14. 2026-10-07 14:42 UTCGHSA enrichment
  15. 2026-10-06 20:31 UTCEG score recompute
  16. 2026-10-06 19:42 UTCEG score recompute
  17. 2026-10-06 19:42 UTCMITRE cvelistV5first tracked

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Frequently asked(5)

What is CVE-2026-104048?
CVE-2026-104048 is a high vulnerability published on October 6, 2026. 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…
When was CVE-2026-104048 disclosed?
CVE-2026-104048 was first published on October 6, 2026, with the most recent update on October 9, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-104048 actively exploited?
CVE-2026-104048 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.3% probability of exploitation in the next 30 days (18th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-104048?
CVE-2026-104048 has a CVSS v3 base score of 8.1 (NVD).
How do I remediate CVE-2026-104048?
No fix for CVE-2026-104048 is confirmed yet. Until one is published, restrict network exposure of the affected system or apply the vendor's mitigation — for example, keep it off the internet or limit it to trusted networks — and watch the vendor's advisory for the fix. The vendor advisories EchelonGraph has for CVE-2026-104048 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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