Deserialization Of Untrusted Data

h2o is vulnerable to Deserialization Of Untrusted Data. The vulnerability is due to improper handling of JDBC connection parameters with insufficient input validation, which allows an attacker to bypass regular expression checks using double URL encoding and subsequently read arbitrary files or...

CVE-2025-6544

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...