CVE-2021-23463: h2database h2

Critical severity, CVSS 9.1. EPSS: 2.8% chance of exploitation in the next 30 days.

The package com.h2database:h2 from 1.4.198 and before 2.0.202 are vulnerable to XML External Entity (XXE) Injection via the org.h2.jdbc.JdbcSQLXML class object, when it receives parsed string data from org.h2.jdbc.JdbcResultSet.getSQLXML() method. If it executes the getSource() method when the parameter is DOMSource.class it will trigger the vulnerability.

Affected products

• h2database h2: from 1.4.198, before 2.0.202 (fixed in 2.0.202)

Published 2021-12-10. Last modified 2026-06-17.