CVE-2026-8751

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 HIGH
CVSS v2.0 7.5 HIGH

7.3^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.4

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact LOW

Integrity Impact LOW

Availability Impact LOW

Scope UNCHANGED

7.5^/10

CVSS v2.0 : HIGH

Vector : AV:N/AC:L/Au:N/C:P/I:P/A:P

Exploitability : 10.0 / Impact : 6.4

Access Vector NETWORK

Access Complexity LOW

Authentication NONE

Confidentiality Impact PARTIAL

Integrity Impact PARTIAL

Availability Impact PARTIAL

References

Link	Resource
https://vuldb.com/submit/810107	Third Party Advisory VDB Entry
https://vuldb.com/vuln/364378	Third Party Advisory VDB Entry
https://vuldb.com/vuln/364378/cti	Permissions Required VDB Entry
https://vulnplus-note.wetolink.com/share/b5nsQg6EcsBS	Broken Link

Configurations

Configuration 1 (hide)

cpe:2.3:a:h2o:h2o:*:*:*:*:*:*:*:*

History

19 May 2026, 17:46

Type	Values Removed	Values Added
CPE		cpe:2.3:a:h2o:h2o::::::::
First Time		H2o H2o h2o
References	~~() https://vuldb.com/submit/810107 -~~	() https://vuldb.com/submit/810107 - Third Party Advisory, VDB Entry
References	~~() https://vuldb.com/vuln/364378 -~~	() https://vuldb.com/vuln/364378 - Third Party Advisory, VDB Entry
References	~~() https://vuldb.com/vuln/364378/cti -~~	() https://vuldb.com/vuln/364378/cti - Permissions Required, VDB Entry
References	~~() https://vulnplus-note.wetolink.com/share/b5nsQg6EcsBS -~~	() https://vulnplus-note.wetolink.com/share/b5nsQg6EcsBS - Broken Link

17 May 2026, 12:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-05-17 12:16

Updated : 2026-05-19 17:46

NVD link : CVE-2026-8751

Mitre link : CVE-2026-8751

CVE.ORG link : CVE-2026-8751

JSON object : View

Products Affected

h2o

h2o

CWE

CWE-20

Improper Input Validation

CWE-502

Deserialization of Untrusted Data

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