Improper Restriction of XML External Entity Reference in com.h2database:h2.
H2 is an embeddable RDBMS written in Java. 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 software
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| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Java / Kotlin (Maven) | com.h2database:h2 | >= 1.4.198, < 2.0.202 | 2.0.202 |
References
- https://nvd.nist.gov/vuln/detail/CVE-2021-23463
- https://github.com/h2database/h2database/issues/3195
- https://github.com/h2database/h2database/pull/3199
- https://github.com/h2database/h2database/pull/3199#issuecomment-1002830390
- https://github.com/boris-unckel/h2database/commit/f9ad6aef2bfa59eba2b4d3e7c4c32d2cce8e8b05
- https://github.com/h2database/h2database/commit/d83285fd2e48fb075780ee95badee6f5a15ea7f8%23diff-008c2e4462609982199cd83e7cf6f1d6b41296b516783f6752c44b9f15dc7bc3
- https://github.com/h2database/h2database
- https://security.netapp.com/advisory/ntap-20230818-0010
- https://snyk.io/vuln/SNYK-JAVA-COMH2DATABASE-1769238
- https://www.oracle.com/security-alerts/cpuapr2022.html
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H- Weakness (CWE)
CWE-611- Platform
- Java / Kotlin (Maven)
- Package
com.h2database:h2- Disclosed
- 16.12.2021
- Updated
- 11.10.2026 12:22
Sources and licenses
OSV / GitHub Advisory Database - GHSA-7rpj-hg47-cx62 - CC BY 4.0
Vulnerability history: com.h2database:h2
All published vulnerabilities of this package (Java / Kotlin (Maven)), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 4
- First → latest
- 12.2021 11.2022
- Without a fix
- 0
- Exploited in attacks
- 0
Severity breakdown
- Critical 2
- High 2
Disclosures per year
- 2021: 1
- 2022: 3
- 2023: 0
- 2024: 0
- 2025: 0
- 2026: 0
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Improper Restriction of XML External Entity Reference in com.h2database:h2. this entry
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