Remote Code Execution in h2oai/h2o-3_CVE-2026-3960

5.9 / 10

MEDIUM

CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

Description

A critical remote code execution vulnerability exists in the unauthenticated REST API endpoint /99/ImportSQLTable in H2O-3 version 3.46.0.9 and prior. The vulnerability arises due to insufficient security controls in the parameter blacklist mechanism, which only targets MySQL JDBC driver-specific dangerous parameters. An attacker can bypass these controls by switching the JDBC URL protocol to jdbc:postgresql: and exploiting PostgreSQL JDBC driver-specific parameters such as socketFactory and socketFactoryArg. This allows unauthenticated attackers to execute arbitrary code on the H2O-3 server with the privileges of the H2O-3 process. The issue is resolved in version 3.46.0.10.

Basic Information

ID CVE-2026-3960

Source @huntr_ai

Published Apr 23, 2026 at 08:47

Affected Product

Vendor h2oai

Product h2oai/h2o-3

Version unspecified

Affected Versions h2oai h2oai/h2o-3 unspecified

CWE Classification

CWE-94

References

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    "published": "2026-04-23T08:47:48.618Z",
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