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CVE-2026-8751— h2oai h2o-3 JAR Model.java importBinaryModel deserialization

Quick assessment

Affected
h2oai h2o-3
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

H2O是H2O.ai开源的一个用于分布式、可扩展机器学习的内存平台。 H2O 7402及之前版本存在输入验证错误漏洞，该漏洞源于JAR Handler组件中Model.java文件的importBinaryModel函数存在反序列化。攻击者可能远程利用此漏洞。

CVSS 7.3 · High EPSS 0.77% · P54

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

VendorProduct Version RangeStatus
h2oai h2o-3 7402 affected
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I. Basic Information for CVE-2026-8751

Vulnerability Information
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Vulnerability Title
h2oai h2o-3 JAR Model.java importBinaryModel deserialization
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
可信数据的反序列化
Source: CVE Program / CVE List V5
Vulnerability Title
H2O 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
H2O是H2O.ai开源的一个用于分布式、可扩展机器学习的内存平台。 H2O 7402及之前版本存在输入验证错误漏洞，该漏洞源于JAR Handler组件中Model.java文件的importBinaryModel函数存在反序列化。攻击者可能远程利用此漏洞。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
h2oai h2o-3 7402 cpe:2.3:a:h2oai:h2o-3:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-8751

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III. Intelligence Information for CVE-2026-8751

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Other References for CVE-2026-8751 (1)

Same Patch Batch · h2oai · 2026-05-17 · 3 CVEs total

CVE-2026-8750 5.3 MEDIUM h2oai h2o-3 ImportFile API PersistNFS.java importFiles information disclosure
CVE-2026-8752 5.3 MEDIUM h2oai h2o-3 Rapids setproperty Primitive AstSetProperty.java exec access control

IV. Related Vulnerabilities

Same product: h2o-3
Same vendor: h2oai
Same weakness: CWE-502

V. Comments for CVE-2026-8751

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