CVE-2026-8400

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.8 under NVD CVSS v3. EPSS exploit probability: 0.3%, top 80% of all CVEs by exploit prediction. GitHub Security Advisory enrichment pending alignment with NVD CVSS.

Triggered by: NVD CVSS baseline
Sources: epss, ghsa, nvd
Trending — 4 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: 0%CVSS: 9.8Exploit: None knownExposed: 0

A fix is available — apply it.

IBM WebSphere Application Server 8.5, and 9.0 and IBM WebSphere Application Server - Liberty Continuous delivery has a flaw in the ORB component in IBM SDK, Java Technology Edition, may allow a malicious IIOP server to induce loading and instantation of arbitrary classes.

CVSS v3
9.8
EG Score
9.8(medium)
EG Risk
44(Track)
EG Risk 44/100SSVC: 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%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
20%
KEV
Not listed

Published

August 5, 2026

Last Modified

August 10, 2026

Advisory Details (1)

Auto-updated Sep 14, 2026
No patch confirmed yet.
generic

Security Bulletin: Multiple Vulnerabilities in IBM® Java SDK affect IBM WebSphere Application Server and WebSphere Application Server Liberty due to the July 2026 CPU

https://www.ibm.com/support/pages/node/7282446

Vendor Advisories for CVE-2026-8400(2)

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

Patch Availability(1)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatjava-1.8.0-ibm-1:1.8.0.8.70-1.el8_102026-08-10redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 78× in last 7d / 316× 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.

Showing the most recent 100 of 480 total refreshes for this CVE.

  1. 2026-09-19 03:24 UTCVendor advisory
  2. 2026-09-19 03:24 UTCGHSA enrichment
  3. 2026-09-18 22:21 UTCEG score recompute
  4. 2026-09-18 22:21 UTCVendor advisory
  5. 2026-09-18 22:21 UTCGHSA enrichment
  6. 2026-09-18 19:28 UTCEPSS rescore
  7. 2026-09-18 17:42 UTCVendor advisory
  8. 2026-09-18 17:42 UTCGHSA enrichment
  9. 2026-09-18 13:15 UTCVendor advisory
  10. 2026-09-18 13:15 UTCGHSA enrichment
  11. 2026-09-18 08:55 UTCVendor advisory
  12. 2026-09-18 08:55 UTCGHSA enrichment
  13. 2026-09-18 04:59 UTCVendor advisory
  14. 2026-09-18 04:59 UTCGHSA enrichment
  15. 2026-09-18 01:06 UTCEG score recompute
  16. 2026-09-18 01:06 UTCVendor advisory
  17. 2026-09-18 01:06 UTCGHSA enrichment
  18. 2026-09-17 19:32 UTCEPSS rescore
  19. 2026-09-17 15:55 UTCVendor advisory
  20. 2026-09-17 15:55 UTCGHSA enrichment
  21. 2026-09-17 08:57 UTCVendor advisory
  22. 2026-09-17 08:57 UTCGHSA enrichment
  23. 2026-09-17 04:59 UTCVendor advisory
  24. 2026-09-17 04:59 UTCGHSA enrichment
  25. 2026-09-17 01:06 UTCEG score recompute
Show 75 more
  1. 2026-09-17 01:06 UTCVendor advisory
  2. 2026-09-17 01:06 UTCGHSA enrichment
  3. 2026-09-16 14:09 UTCEPSS rescore
  4. 2026-09-16 11:13 UTCVendor advisory
  5. 2026-09-16 11:13 UTCGHSA enrichment
  6. 2026-09-16 07:04 UTCEG score recompute
  7. 2026-09-16 07:04 UTCVendor advisory
  8. 2026-09-16 07:04 UTCGHSA enrichment
  9. 2026-09-16 05:15 UTCEPSS rescore
  10. 2026-09-16 03:11 UTCVendor advisory
  11. 2026-09-16 03:11 UTCGHSA enrichment
  12. 2026-09-15 16:20 UTCVendor advisory
  13. 2026-09-15 16:20 UTCGHSA enrichment
  14. 2026-09-15 06:49 UTCEG score recompute
  15. 2026-09-15 06:49 UTCVendor advisory
  16. 2026-09-15 06:49 UTCGHSA enrichment
  17. 2026-09-15 03:12 UTCEPSS rescore
  18. 2026-09-15 01:28 UTCVendor advisory
  19. 2026-09-15 01:28 UTCGHSA enrichment
  20. 2026-09-14 14:53 UTCVendor advisory
  21. 2026-09-14 14:53 UTCGHSA enrichment
  22. 2026-09-14 11:00 UTCVendor advisory
  23. 2026-09-14 11:00 UTCGHSA enrichment
  24. 2026-09-14 07:07 UTCVendor advisory
  25. 2026-09-14 07:07 UTCGHSA enrichment
  26. 2026-09-14 03:14 UTCVendor advisory
  27. 2026-09-14 03:14 UTCGHSA enrichment
  28. 2026-09-13 23:21 UTCVendor advisory
  29. 2026-09-13 23:21 UTCGHSA enrichment
  30. 2026-09-13 19:28 UTCEG score recompute
  31. 2026-09-13 19:28 UTCVendor advisory
  32. 2026-09-13 19:28 UTCGHSA enrichment
  33. 2026-09-13 16:48 UTCEPSS rescore
  34. 2026-09-13 15:27 UTCVendor advisory
  35. 2026-09-13 15:27 UTCGHSA enrichment
  36. 2026-09-13 11:34 UTCVendor advisory
  37. 2026-09-13 11:34 UTCGHSA enrichment
  38. 2026-09-13 07:41 UTCVendor advisory
  39. 2026-09-13 07:41 UTCGHSA enrichment
  40. 2026-09-13 03:48 UTCVendor advisory
  41. 2026-09-13 03:48 UTCGHSA enrichment
  42. 2026-09-12 23:54 UTCVendor advisory
  43. 2026-09-12 23:54 UTCGHSA enrichment
  44. 2026-09-12 20:00 UTCVendor advisory
  45. 2026-09-12 20:00 UTCGHSA enrichment
  46. 2026-09-12 16:07 UTCEG score recompute
  47. 2026-09-12 16:07 UTCVendor advisory
  48. 2026-09-12 16:07 UTCGHSA enrichment
  49. 2026-09-12 15:02 UTCEPSS rescore
  50. 2026-09-12 12:14 UTCVendor advisory
  51. 2026-09-12 12:14 UTCGHSA enrichment
  52. 2026-09-12 08:14 UTCVendor advisory
  53. 2026-09-12 08:14 UTCGHSA enrichment
  54. 2026-09-12 04:16 UTCVendor advisory
  55. 2026-09-12 04:16 UTCGHSA enrichment
  56. 2026-09-12 00:22 UTCVendor advisory
  57. 2026-09-12 00:22 UTCGHSA enrichment
  58. 2026-09-11 18:33 UTCEG score recompute
  59. 2026-09-11 18:33 UTCVendor advisory
  60. 2026-09-11 18:33 UTCGHSA enrichment
  61. 2026-09-11 14:53 UTCEPSS rescore
  62. 2026-09-11 14:40 UTCVendor advisory
  63. 2026-09-11 14:40 UTCGHSA enrichment
  64. 2026-09-11 09:48 UTCVendor advisory
  65. 2026-09-11 09:48 UTCGHSA enrichment
  66. 2026-09-11 05:55 UTCVendor advisory
  67. 2026-09-11 05:55 UTCGHSA enrichment
  68. 2026-09-11 01:50 UTCVendor advisory
  69. 2026-09-11 01:50 UTCGHSA enrichment
  70. 2026-09-10 21:57 UTCVendor advisory
  71. 2026-09-10 21:57 UTCGHSA enrichment
  72. 2026-09-10 17:54 UTCVendor advisory
  73. 2026-09-10 17:54 UTCGHSA enrichment
  74. 2026-09-10 12:45 UTCEG score recompute
  75. 2026-09-10 12:45 UTCVendor advisory

Frequently asked(5)

What is CVE-2026-8400?
CVE-2026-8400 is a critical vulnerability published on August 5, 2026. IBM WebSphere Application Server 8.5, and 9.0 and IBM WebSphere Application Server - Liberty Continuous delivery has a flaw in the ORB component in IBM SDK, Java Technology Edition, may allow a malicious IIOP server to induce loading and instantation of arbitrary classes.
When was CVE-2026-8400 disclosed?
CVE-2026-8400 was first published in the National Vulnerability Database on August 5, 2026, with the most recent update on August 10, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-8400 actively exploited?
CVE-2026-8400 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 80.0% of all scored CVEs.
What is the CVSS score of CVE-2026-8400?
CVE-2026-8400 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2026-8400?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-8400, 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-2026-8400

Explore →

Is Your Infrastructure Affected by CVE-2026-8400?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs