CVE-2026-86404

HIGHPre-NVD 8.88.8—
EchelonGraph scoreHIGH confidence

Score 8.8 from GitHub Security Advisory (severity: HIGH) published 2026-09-07. a secondary CVSS source baseline 8.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 4 sources updated this week
8.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 8.8Exploit: None knownExposed: 0

A fix is available — apply it.

EAP's Artemis deserialization configuration permits deserialization by default. ObjectMessage.getObject() uses ObjectInputStreamWithClassLoader, which implements allow-list/block-list filtering via its checkSecurity()/isTrustedType() method. However, by default both allow-list and block-list are empty. When the allow-list is empty (size == 0), isTrustedType() returns true for ALL classes. This means all classes are deserializable by default.

CVSS v3
8.8
EG Score
8.8(high)
EG Risk
40(Track)
EG Risk 40/100SSVC: 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
Severity88% × 45%
Exploitation1% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
42%
KEV
Not listed

Published

September 7, 2026

Last Modified

September 18, 2026

Advisory Details (1)

Auto-updated Sep 7, 2026
Patch available. Sources: redhat.
redhat Patch Available

2477930 – (CVE-2026-86404) CVE-2026-86404 artemis-server: artemis-jms-client: artemis-core-client: undertow-core: wildfly-messaging-activemq-subsystem: artemis messaging handlers in Red Hat EAP permit deserialization by default

https://bugzilla.redhat.com/show_bug.cgi?id=2477930

Vendor Advisories for CVE-2026-86404(2)

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

Patch Availability(3)

Vendor / EcosystemFixed in / PatchReleasedSource
redhateap7-wildfly-0:7.4.25-2.GA_redhat_00001.1.el7eap2026-08-11redhat
redhateap7-wildfly-0:7.4.25-2.GA_redhat_00001.1.el8eap2026-08-11redhat
redhateap7-wildfly-0:7.4.25-2.GA_redhat_00001.1.el9eap2026-08-11redhat

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.

Additional Vendor Advisories

(2)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 50× in last 7d / 88× 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. 2026-09-18 23:44 UTCEG score recompute
  2. 2026-09-18 23:44 UTCVendor advisory
  3. 2026-09-18 23:44 UTCGHSA enrichment
  4. 2026-09-18 19:28 UTCEPSS rescore
  5. 2026-09-18 12:06 UTCVendor advisory
  6. 2026-09-18 12:06 UTCGHSA enrichment
  7. 2026-09-18 00:28 UTCEG score recompute
  8. 2026-09-18 00:28 UTCVendor advisory
  9. 2026-09-18 00:28 UTCGHSA enrichment
  10. 2026-09-17 23:44 UTCEG score recompute
  11. 2026-09-17 23:44 UTCVendor advisory
  12. 2026-09-17 23:44 UTCGHSA enrichment
  13. 2026-09-17 19:32 UTCEPSS rescore
  14. 2026-09-17 19:28 UTCEG score recompute
  15. 2026-09-17 19:28 UTCVendor advisory
  16. 2026-09-17 19:28 UTCGHSA enrichment
  17. 2026-09-17 18:29 UTCEG score recompute
  18. 2026-09-17 18:29 UTCVendor advisory
  19. 2026-09-17 18:29 UTCGHSA enrichment
  20. 2026-09-17 10:15 UTCVendor advisory
  21. 2026-09-17 10:15 UTCGHSA enrichment
  22. 2026-09-16 22:37 UTCEG score recompute
  23. 2026-09-16 22:37 UTCVendor advisory
  24. 2026-09-16 22:37 UTCGHSA enrichment
  25. 2026-09-16 14:09 UTCEPSS rescore
Show 63 more
  1. 2026-09-16 10:59 UTCEG score recompute
  2. 2026-09-16 10:59 UTCVendor advisory
  3. 2026-09-16 10:59 UTCGHSA enrichment
  4. 2026-09-16 05:15 UTCEPSS rescore
  5. 2026-09-15 23:22 UTCVendor advisory
  6. 2026-09-15 23:22 UTCGHSA enrichment
  7. 2026-09-15 11:09 UTCEG score recompute
  8. 2026-09-15 11:09 UTCVendor advisory
  9. 2026-09-15 11:09 UTCGHSA enrichment
  10. 2026-09-15 03:12 UTCEPSS rescore
  11. 2026-09-15 03:12 UTCEPSS rescore
  12. 2026-09-14 23:31 UTCVendor advisory
  13. 2026-09-14 23:31 UTCGHSA enrichment
  14. 2026-09-14 11:52 UTCVendor advisory
  15. 2026-09-14 11:52 UTCGHSA enrichment
  16. 2026-09-14 00:14 UTCEG score recompute
  17. 2026-09-14 00:14 UTCVendor advisory
  18. 2026-09-14 00:14 UTCGHSA enrichment
  19. 2026-09-13 12:37 UTCVendor advisory
  20. 2026-09-13 12:37 UTCGHSA enrichment
  21. 2026-09-13 00:56 UTCEG score recompute
  22. 2026-09-13 00:56 UTCVendor advisory
  23. 2026-09-13 00:56 UTCGHSA enrichment
  24. 2026-09-12 13:18 UTCVendor advisory
  25. 2026-09-12 13:18 UTCGHSA enrichment
  26. 2026-09-12 01:41 UTCEG score recompute
  27. 2026-09-12 01:41 UTCVendor advisory
  28. 2026-09-12 01:41 UTCGHSA enrichment
  29. 2026-09-11 14:53 UTCEPSS rescore
  30. 2026-09-11 14:53 UTCEPSS rescore
  31. 2026-09-11 14:03 UTCEG score recompute
  32. 2026-09-11 14:03 UTCVendor advisory
  33. 2026-09-11 14:03 UTCGHSA enrichment
  34. 2026-09-11 02:25 UTCVendor advisory
  35. 2026-09-11 02:25 UTCGHSA enrichment
  36. 2026-09-10 14:47 UTCEG score recompute
  37. 2026-09-10 14:47 UTCVendor advisory
  38. 2026-09-10 14:47 UTCGHSA enrichment
  39. 2026-09-10 03:09 UTCVendor advisory
  40. 2026-09-10 03:09 UTCGHSA enrichment
  41. 2026-09-09 15:31 UTCEG score recompute
  42. 2026-09-09 15:31 UTCVendor advisory
  43. 2026-09-09 15:31 UTCGHSA enrichment
  44. 2026-09-09 14:37 UTCEG score recompute
  45. 2026-09-09 14:37 UTCVendor advisory
  46. 2026-09-09 14:37 UTCGHSA enrichment
  47. 2026-09-09 07:30 UTCEG score recompute
  48. 2026-09-09 07:30 UTCVendor advisory
  49. 2026-09-09 07:30 UTCGHSA enrichment
  50. 2026-09-08 22:01 UTCEPSS rescore
  51. 2026-09-08 19:53 UTCVendor advisory
  52. 2026-09-08 19:52 UTCGHSA enrichment
  53. 2026-09-08 16:15 UTCVendor advisory
  54. 2026-09-08 16:15 UTCGHSA enrichment
  55. 2026-09-08 02:04 UTCVendor advisory
  56. 2026-09-08 02:04 UTCGHSA enrichment
  57. 2026-09-07 14:27 UTCEG score recompute
  58. 2026-09-07 14:26 UTCGHSA enrichment
  59. 2026-09-07 13:58 UTCEG score recompute
  60. 2026-09-07 13:58 UTCGHSA enrichment
  61. 2026-09-07 12:22 UTCEG score recompute
  62. 2026-09-07 11:43 UTCEG score recompute
  63. 2026-09-07 11:41 UTCMITRE cvelistV5first tracked

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-86404?
CVE-2026-86404 is a high vulnerability published on September 7, 2026. EAP's Artemis deserialization configuration permits deserialization by default. ObjectMessage.getObject() uses ObjectInputStreamWithClassLoader, which implements allow-list/block-list filtering via its checkSecurity()/isTrustedType() method. However, by default both allow-list and block-list are…
When was CVE-2026-86404 disclosed?
CVE-2026-86404 was first published in the National Vulnerability Database on September 7, 2026, with the most recent update on September 18, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-86404 actively exploited?
CVE-2026-86404 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 58.4% of all scored CVEs.
What is the CVSS score of CVE-2026-86404?
CVE-2026-86404 has a CVSS v3 base score of 8.8 (NVD).
How do I remediate CVE-2026-86404?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-86404, 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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