CVE-2026-8400

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.8 under NVD CVSS v3. EPSS exploit probability: 0.5%, top 60% 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
40%
KEV
Not listed

Published

August 5, 2026

Last Modified

August 10, 2026

Advisory Details (1)

Auto-updated Aug 17, 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 100× in last 7d / 178× 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 178 total refreshes for this CVE.

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

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 60.3% 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

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