CVE-2026-8751

HIGHNVD 7.37.3—
EchelonGraph scoreMEDIUM confidence

Score 7.3 from GitHub Security Advisory published 2026-05-17. NVD baseline CVSS 7.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
7.3
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 7.3Exploit: NoneExposed: 0

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

A security flaw has been discovered in h2oai h2o-3 up to 7402. This affects the function importBinaryModel of the file h2o-core/src/main/java/hex/Model.java of the component JAR Handler. Performing a manipulation results in deserialization. The attack is possible to be carried out remotely. The exploit has been released to the public and may be used for attacks. The vendor was contacted early about this disclosure but did not respond in any way.

CVSS v3
7.3
EG Score
7.3(medium)
EPSS
33.1%
KEV
Not listed

Published

May 17, 2026

Last Modified

May 19, 2026

Advisory Details (1)

Auto-updated May 17, 2026
🔬 Proof of concept available. No patch confirmed yet.
generic🟡 PoC Available

H2O-3 Pre-Auth Insecure Deserialization in Binary Model Import Allows Execution of Attacker-Controlled JAR via Restored custom_metric_func

https://vulnplus-note.wetolink.com/share/b5nsQg6EcsBS

Vendor Advisories for CVE-2026-8751(1)

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

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 7× in last 7d / 51× 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 133 total refreshes for this CVE.

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

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Frequently asked(5)

What is CVE-2026-8751?
CVE-2026-8751 is a high vulnerability published on May 17, 2026. A security flaw has been discovered in h2oai h2o-3 up to 7402. This affects the function importBinaryModel of the file h2o-core/src/main/java/hex/Model.java of the component JAR Handler. Performing a manipulation results in deserialization. The attack is possible to be carried out remotely. The…
When was CVE-2026-8751 disclosed?
CVE-2026-8751 was first published in the National Vulnerability Database on May 17, 2026, with the most recent update on May 19, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-8751 actively exploited?
CVE-2026-8751 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 33.1% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-8751?
CVE-2026-8751 has a CVSS v3 base score of 7.3 (NVD).
How do I remediate CVE-2026-8751?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-8751, 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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