PYSEC-2026-1444 H2O Vulnerable to Denial of Service (DoS) and File Write

In h2oai/h2o-3 version 3.46.0.1, the runtool command exposes classes in the water.tools package through the ast parser. This includes the XGBoostLibExtractTool class, which can be exploited to shut down the server and write large files to arbitrary directories, leading to a denial of service...

Denial of Service (DoS)

Overview Affected versions of this package are vulnerable to Denial of Service DoS through the runtool command which exposes classes in the water.tools package via the ast parser. An attacker can shut down the server and write large files to arbitrary directories by exploiting the...