CVE-2026-70410

Apache Calcite Avatica: Unrestricted class initialization when instantiating plugins

Published Sep 22, 2026 CVSS 3.1 · 8.8 High EPSS < 1% KEV · Not listed
Description
Use of Externally-Controlled Input to Select Classes or Code ('Unsafe Reflection') vulnerability in Apache Calcite Avatica. Plugin instantiation (via AvaticaUtils#instantiatePlugin and other methods) initializes arbitrary classes via unrestricted calls to Class.forName(String) which by default triggers initialization. This may lead to the execution of static initializer blocks in arbitrary classes present in the classpath. The instantiation APIs should initialize and instantiate only classes implementing the specified plugin interface passed as input in conjunction with the desired classname. At the moment of writing, there are no well-known or widely used classes with dangerous static initializer blocks so the severity is low.



This issue affects Apache Calcite Avatica: before 1.29.0.



Users are recommended to upgrade to version 1.29.0, which fixes the issue.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Metrics cvssV3_1

{'score': 8.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'}

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Apache
Apache apache Calcite Avatica
Vendors & Products Apache
Apache apache Calcite Avatica
Type Values Removed Values Added
Description Use of Externally-Controlled Input to Select Classes or Code ('Unsafe Reflection') vulnerability in Apache Calcite Avatica. Plugin instantiation (via AvaticaUtils#instantiatePlugin and other methods) initializes arbitrary classes via unrestricted calls to Class.forName(String) which by default triggers initialization. This may lead to the execution of static initializer blocks in arbitrary classes present in the classpath. The instantiation APIs should initialize and instantiate only classes implementing the specified plugin interface passed as input in conjunction with the desired classname. At the moment of writing, there are no well-known or widely used classes with dangerous static initializer blocks so the severity is low. This issue affects Apache Calcite Avatica: before 1.29.0. Users are recommended to upgrade to version 1.29.0, which fixes the issue.
Title Apache Calcite Avatica: Unrestricted class initialization when instantiating plugins
Weaknesses CWE-470
References
Weaknesses

Sources

Status
PUBLISHED
Assigner
apache
Published
Updated
Sep 22, 2026, 7:19 PM
Reserved
Aug 4, 2026, 11:08 AM
Status
Awaiting Analysis
Published
Sep 22, 2026, 4:17 PM
Modified
Sep 22, 2026, 8:17 PM