CVE-2025-6544

CRITICAL9.8EPSS 0.65%

H2O affected by a deserialization vulnerability

Published: 9/22/2025Modified: 9/22/2025
Also known as:GHSA-5w3j-gwgh-4rfv

Description

A deserialization vulnerability exists in h2oai/h2o-3 versions <= 3.46.0.7, allowing attackers to read arbitrary system files and execute arbitrary code. The vulnerability arises from improper handling of JDBC connection parameters, which can be exploited by bypassing regular expression checks and using double URL encoding. This issue impacts all users of the affected versions.

Affected packages (2)

CVSS scores

SourceVersionSeverityVector
osvCVSS 3.1CRITICAL9.8CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References (4)