CVE-2026-26035

CRITICALPre-NVD 9.89.8—
EchelonGraph scoreHIGH confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-08-12. 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.

An Improper Authentication vulnerability [CWE-287] vulnerability in Fortinet FortiWeb 8.0.0 through 8.0.2, FortiWeb 7.6.0 through 7.6.6, FortiWeb 7.4.0 through 7.4.11, FortiWeb 7.2.0 through 7.2.12, FortiWeb 7.0.0 through 7.0.12 may allow a remote unauthenticated attacker to login into the Fortiweb GUI/CLI with a random username and password

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
41%
KEV
Not listed

Published

August 12, 2026

Last Modified

August 13, 2026

Advisory Details (1)

Auto-updated Aug 20, 2026
No patch confirmed yet.
generic

Just a moment

https://fortiguard.fortinet.com/psirt/FG-IR-26-158

Vendor Advisories for CVE-2026-26035(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 56× in last 7d / 77× 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. 2026-08-20 17:55 UTCGHSA enrichment
  2. 2026-08-20 14:05 UTCGHSA enrichment
  3. 2026-08-20 09:57 UTCGHSA enrichment
  4. 2026-08-20 06:07 UTCGHSA enrichment
  5. 2026-08-20 02:17 UTCGHSA enrichment
  6. 2026-08-19 22:27 UTCGHSA enrichment
  7. 2026-08-19 18:37 UTCEG score recompute
  8. 2026-08-19 18:37 UTCGHSA enrichment
  9. 2026-08-19 17:03 UTCEPSS rescore
  10. 2026-08-19 13:04 UTCGHSA enrichment
  11. 2026-08-19 09:09 UTCGHSA enrichment
  12. 2026-08-19 05:19 UTCGHSA enrichment
  13. 2026-08-19 01:28 UTCGHSA enrichment
  14. 2026-08-18 21:39 UTCGHSA enrichment
  15. 2026-08-18 17:22 UTCEG score recompute
  16. 2026-08-18 17:22 UTCGHSA enrichment
  17. 2026-08-18 13:48 UTCEPSS rescore
  18. 2026-08-18 12:15 UTCGHSA enrichment
  19. 2026-08-18 08:20 UTCGHSA enrichment
  20. 2026-08-18 04:27 UTCGHSA enrichment
  21. 2026-08-18 00:38 UTCGHSA enrichment
  22. 2026-08-17 20:44 UTCGHSA enrichment
  23. 2026-08-17 16:53 UTCEG score recompute
  24. 2026-08-17 16:53 UTCGHSA enrichment
  25. 2026-08-17 13:47 UTCEPSS rescore
Show 52 more
  1. 2026-08-17 13:03 UTCGHSA enrichment
  2. 2026-08-17 09:14 UTCGHSA enrichment
  3. 2026-08-17 05:24 UTCGHSA enrichment
  4. 2026-08-17 01:18 UTCGHSA enrichment
  5. 2026-08-16 21:28 UTCGHSA enrichment
  6. 2026-08-16 17:38 UTCEG score recompute
  7. 2026-08-16 17:38 UTCGHSA enrichment
  8. 2026-08-16 14:56 UTCEPSS rescore
  9. 2026-08-16 13:44 UTCGHSA enrichment
  10. 2026-08-16 09:54 UTCGHSA enrichment
  11. 2026-08-16 06:05 UTCGHSA enrichment
  12. 2026-08-16 02:15 UTCEG score recompute
  13. 2026-08-16 02:15 UTCGHSA enrichment
  14. 2026-08-16 02:14 UTCEPSS rescore
  15. 2026-08-15 22:26 UTCGHSA enrichment
  16. 2026-08-15 18:36 UTCGHSA enrichment
  17. 2026-08-15 14:46 UTCGHSA enrichment
  18. 2026-08-15 10:56 UTCGHSA enrichment
  19. 2026-08-15 07:06 UTCGHSA enrichment
  20. 2026-08-15 03:16 UTCEG score recompute
  21. 2026-08-15 03:16 UTCGHSA enrichment
  22. 2026-08-15 01:30 UTCEPSS rescore
  23. 2026-08-14 23:26 UTCGHSA enrichment
  24. 2026-08-14 19:37 UTCGHSA enrichment
  25. 2026-08-14 15:46 UTCGHSA enrichment
  26. 2026-08-14 11:56 UTCGHSA enrichment
  27. 2026-08-14 08:07 UTCGHSA enrichment
  28. 2026-08-14 04:17 UTCGHSA enrichment
  29. 2026-08-14 00:28 UTCEG score recompute
  30. 2026-08-14 00:28 UTCGHSA enrichment
  31. 2026-08-13 22:00 UTCEPSS rescore
  32. 2026-08-13 20:38 UTCGHSA enrichment
  33. 2026-08-13 16:48 UTCGHSA enrichment
  34. 2026-08-13 12:58 UTCGHSA enrichment
  35. 2026-08-13 09:09 UTCGHSA enrichment
  36. 2026-08-13 05:19 UTCEG score recompute
  37. 2026-08-13 05:19 UTCGHSA enrichment
  38. 2026-08-13 05:17 UTCNVD updateCVSS v3 → 9.8 · severity → CRITICAL
  39. 2026-08-13 04:21 UTCEG score recompute
  40. 2026-08-13 04:21 UTCGHSA enrichment
  41. 2026-08-13 04:20 UTCMITRE cvelistV5CVSS v3 → 8.8 · severity → HIGH
  42. 2026-08-13 01:56 UTCGHSA enrichment
  43. 2026-08-12 22:06 UTCGHSA enrichment
  44. 2026-08-12 18:17 UTCEG score recompute
  45. 2026-08-12 18:17 UTCGHSA enrichment
  46. 2026-08-12 14:23 UTCEG score recompute
  47. 2026-08-12 14:23 UTCNVD updateCVSS v3 → 9.8 · severity → CRITICAL
  48. 2026-08-12 13:58 UTCMITRE cvelistV5CVSS v3 → 8.8 · severity → HIGH
  49. 2026-08-12 13:37 UTCEG score recompute▲ 1.00
  50. 2026-08-12 13:36 UTCNVD updateCVSS v3 → 9.8 · severity → CRITICAL
  51. 2026-08-12 12:35 UTCEG score recompute
  52. 2026-08-12 12:34 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-26035?
CVE-2026-26035 is a critical vulnerability published on August 12, 2026. An Improper Authentication vulnerability [CWE-287] vulnerability in Fortinet FortiWeb 8.0.0 through 8.0.2, FortiWeb 7.6.0 through 7.6.6, FortiWeb 7.4.0 through 7.4.11, FortiWeb 7.2.0 through 7.2.12, FortiWeb 7.0.0 through 7.0.12 may allow a remote unauthenticated attacker to login into the Fortiweb…
When was CVE-2026-26035 disclosed?
CVE-2026-26035 was first published in the National Vulnerability Database on August 12, 2026, with the most recent update on August 13, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-26035 actively exploited?
CVE-2026-26035 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 58.6% of all scored CVEs.
What is the CVSS score of CVE-2026-26035?
CVE-2026-26035 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2026-26035?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-26035, 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

Explore the affected products and dependency analysis for CVE-2026-26035

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