Deserialization of Untrusted Data Affecting ai.h2o:h2o-core package, versions [,3.46.0.10)
Threat Intelligence
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- published1 Apr 2026
- disclosed1 Apr 2026
- creditUnknown
Introduced: 1 Apr 2026
New CVE NOT AVAILABLE CWE-502 (opens in a new tab)How to fix?
Upgrade ai.h2o:h2o-core to version 3.46.0.10 or higher.
Overview
Affected versions of this package are vulnerable to Deserialization of Untrusted Data due to vulnerable PostgreSQL JDBC connection parameters not being blocked by default. An attacker can exploit this vulnerability by injecting dangerous JDBC parameters (such as socketFactory, sslfactory, or loggerFile) in connection strings to potentially achieve remote code execution, arbitrary file writes, or server-side request forgery.
Note:
This is caused by an incomplete fix for CVE-2024-45758.
Details
Serialization is a process of converting an object into a sequence of bytes which can be persisted to a disk or database or can be sent through streams. The reverse process of creating object from sequence of bytes is called deserialization. Serialization is commonly used for communication (sharing objects between multiple hosts) and persistence (store the object state in a file or a database). It is an integral part of popular protocols like Remote Method Invocation (RMI), Java Management Extension (JMX), Java Messaging System (JMS), Action Message Format (AMF), Java Server Faces (JSF) ViewState, etc.
Deserialization of untrusted data (CWE-502) is when the application deserializes untrusted data without sufficiently verifying that the resulting data will be valid, thus allowing the attacker to control the state or the flow of the execution.