CVE-2026-8751 | THREATINT

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.

PUBLISHED Reserved 2026-05-16 | Published 2026-05-17 | Updated 2026-05-18 | Assigner VulDB

MEDIUM: 6.9CVSS: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

HIGH: 7.3CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R

HIGH: 7.3CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R

7.5AV:N/AC:L/Au:N/C:P/I:P/A:P/E:POC/RL:ND/RC:UR

Problem types

Deserialization

Improper Input Validation

Product status

7402

affected

Timeline

2026-05-16:	Advisory disclosed
2026-05-16:	VulDB entry created
2026-05-16:	VulDB entry last update

Credits

vulnplusbot (VulDB User) reporter

VulDB CNA Team coordinator

References

vuldb.com/vuln/364378 (VDB-364378 | h2oai h2o-3 JAR Model.java importBinaryModel deserialization) vdb-entry technical-description

vuldb.com/vuln/364378/cti (VDB-364378 | CTI Indicators (IOB, IOC, IOA)) signature permissions-required

vuldb.com/submit/810107 (Submit #810107 | H2O-3 latest Pre-Auth Insecure Deserialization) third-party-advisory

vulnplus-note.wetolink.com/share/b5nsQg6EcsBS exploit

cve.org (CVE-2026-8751)

nvd.nist.gov (CVE-2026-8751)

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