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Vulnerability record · CVE-2026-8751 · published 17 May 2026

CVE-2026-8751: H2o improper input validation vulnerability

H2o · H2o

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.

5.5 CVSS 4.0 Medium EPSS 0.77% · top 45.9% CWE-20 · Improper input validationCWE-502 · Deserialization of untrusted data
5.5CVSS 4.0 base score, v2 7.5
0.77%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
4References
17 Jun 2026Last modified by NVD

Description

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:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://vuldb.com/submit/810107 Third Party AdvisoryVDB Entry
https://vuldb.com/vuln/364378 Third Party AdvisoryVDB Entry
https://vuldb.com/vuln/364378/cti Permissions RequiredVDB Entry
https://vulnplus-note.wetolink.com/share/b5nsQg6EcsBS Broken Link

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2026-8751), CISA KEV, FIRST EPSS (scores of 2026-10-05). This page is refreshed as NVD updates the record.