CVE-2026-84390

CRITICALPre-NVD 9.89.8—
EchelonGraph scoreHIGH confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-09-11. a secondary CVSS source baseline 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 9.8Exploit: None knownExposed: 0

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

A inclusion of sensitive information in source code vulnerability in Fortinet FortiMonitorOnSight 7.2.4 through 7.2.7, FortiMonitorOnSight 7.2.0 through 7.2.2 may allow attacker to improper access control via

CVSS v3
9.8
EG Score
9.8(high)
EG Risk
59(Track)
EG Risk 59/100SSVC: Track

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
Severity98% × 45%
Exploitation1% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
43%
KEV
Not listed

Published

September 11, 2026

Last Modified

September 11, 2026

Advisory Details (1)

Auto-updated Sep 18, 2026
No patch confirmed yet.
generic

Just a moment

https://fortiguard.fortinet.com/psirt/FG-IR-26-170

Vendor Advisories for CVE-2026-84390(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 54× in last 7d / 64× 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. 2026-09-19 05:35 UTCGHSA enrichment
  2. 2026-09-19 01:27 UTCGHSA enrichment
  3. 2026-09-18 21:18 UTCEG score recompute
  4. 2026-09-18 21:18 UTCGHSA enrichment
  5. 2026-09-18 19:28 UTCEPSS rescore
  6. 2026-09-18 16:37 UTCGHSA enrichment
  7. 2026-09-18 12:29 UTCGHSA enrichment
  8. 2026-09-18 08:21 UTCGHSA enrichment
  9. 2026-09-18 04:10 UTCGHSA enrichment
  10. 2026-09-18 00:02 UTCGHSA enrichment
  11. 2026-09-17 19:54 UTCEG score recompute
  12. 2026-09-17 19:54 UTCGHSA enrichment
  13. 2026-09-17 19:32 UTCEPSS rescore
  14. 2026-09-17 15:44 UTCGHSA enrichment
  15. 2026-09-17 11:36 UTCGHSA enrichment
  16. 2026-09-17 07:27 UTCGHSA enrichment
  17. 2026-09-17 03:20 UTCGHSA enrichment
  18. 2026-09-16 23:11 UTCGHSA enrichment
  19. 2026-09-16 19:03 UTCGHSA enrichment
  20. 2026-09-16 14:55 UTCEG score recompute
  21. 2026-09-16 14:55 UTCGHSA enrichment
  22. 2026-09-16 14:09 UTCEPSS rescore
  23. 2026-09-16 10:47 UTCGHSA enrichment
  24. 2026-09-16 06:39 UTCEG score recompute
  25. 2026-09-16 06:39 UTCGHSA enrichment
Show 39 more
  1. 2026-09-16 05:15 UTCEPSS rescore
  2. 2026-09-16 02:32 UTCGHSA enrichment
  3. 2026-09-15 22:24 UTCGHSA enrichment
  4. 2026-09-15 18:15 UTCGHSA enrichment
  5. 2026-09-15 14:06 UTCGHSA enrichment
  6. 2026-09-15 09:58 UTCGHSA enrichment
  7. 2026-09-15 05:50 UTCEG score recompute
  8. 2026-09-15 05:50 UTCGHSA enrichment
  9. 2026-09-15 03:12 UTCEPSS rescore
  10. 2026-09-15 03:12 UTCEPSS rescore
  11. 2026-09-15 01:42 UTCGHSA enrichment
  12. 2026-09-14 21:34 UTCGHSA enrichment
  13. 2026-09-14 17:15 UTCGHSA enrichment
  14. 2026-09-14 13:07 UTCGHSA enrichment
  15. 2026-09-14 08:59 UTCGHSA enrichment
  16. 2026-09-14 04:51 UTCGHSA enrichment
  17. 2026-09-14 00:43 UTCGHSA enrichment
  18. 2026-09-13 20:36 UTCEG score recompute
  19. 2026-09-13 20:36 UTCGHSA enrichment
  20. 2026-09-13 16:28 UTCGHSA enrichment
  21. 2026-09-13 12:21 UTCGHSA enrichment
  22. 2026-09-13 08:13 UTCGHSA enrichment
  23. 2026-09-13 04:06 UTCGHSA enrichment
  24. 2026-09-12 23:58 UTCGHSA enrichment
  25. 2026-09-12 19:50 UTCGHSA enrichment
  26. 2026-09-12 15:42 UTCEG score recompute
  27. 2026-09-12 15:42 UTCGHSA enrichment
  28. 2026-09-12 11:34 UTCGHSA enrichment
  29. 2026-09-12 07:26 UTCGHSA enrichment
  30. 2026-09-12 03:19 UTCGHSA enrichment
  31. 2026-09-11 23:11 UTCGHSA enrichment
  32. 2026-09-11 18:34 UTCGHSA enrichment
  33. 2026-09-11 17:31 UTCEG score recompute
  34. 2026-09-11 17:31 UTCGHSA enrichment
  35. 2026-09-11 13:23 UTCEG score recompute▲ 0.20
  36. 2026-09-11 13:23 UTCNVD updateCVSS v3 → 9.8
  37. 2026-09-11 12:55 UTCEG score recompute
  38. 2026-09-11 12:20 UTCEG score recompute
  39. 2026-09-11 12:20 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-84390?
CVE-2026-84390 is a critical vulnerability published on September 11, 2026. A inclusion of sensitive information in source code vulnerability in Fortinet FortiMonitorOnSight 7.2.4 through 7.2.7, FortiMonitorOnSight 7.2.0 through 7.2.2 may allow attacker to improper access control via <insert attack vector here>
When was CVE-2026-84390 disclosed?
CVE-2026-84390 was first published in the National Vulnerability Database on September 11, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-84390 actively exploited?
CVE-2026-84390 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 56.7% of all scored CVEs.
What is the CVSS score of CVE-2026-84390?
CVE-2026-84390 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2026-84390?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-84390, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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