CVE-2026-70410 Apache Calcite Avatica: Unrestricted class initialization when instantiating plugins
Attackers can trigger arbitrary class initialization via unsafe reflection in Apache Calcite Avatica, potentially executing static initializer blocks.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-70410?
CVE-2026-70410 is a high-severity code injection vulnerability in Apache Calcite Avatica, published on 22 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official 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.
Weakness: CWE-470
Which versions are affected by CVE-2026-70410?
How do I fix CVE-2026-70410?
No fix has been published for CVE-2026-70410 yet. Limit exposure of the affected software until one is available.
Upgrade, and never evaluate templates, expressions or code built from user input. More about Code injection.
Is CVE-2026-70410 being exploited?
There is no known exploitation of CVE-2026-70410 in the wild and no public exploit code.
Sources
Also known as GHSA-rqpp-92mg-pcvc.