CVE-2025-6544 — Deserialization Vulnerability in h2oai/h2o-3
A deserialization vulnerability exists in h2oai/h2o-3 versions <= 3.46.0.8, allowing attackers to read arbitrary system files and execute arbitrary code. The vulnerability arise…
Published: 2025-09-21 · CVSS: 9.8 · CVSS 3.0
A deserialization vulnerability exists in h2oai/h2o-3 versions <= 3.46.0.8, 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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7