CVE-2026-46718: Apache Calcite: A user-controled model can load arbitrary classes, leading to code execution

Severity: medium (CVSS 6.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-06-02 · updated 2026-07-22
Weakness: CWE-470

Description

Use of Externally-Controlled Input to Select Classes or Code ('Unsafe Reflection') vulnerability in Apache Calcite. This issue affects Apache Calcite: from 1.5.0 before 1.42. Users are recommended to upgrade to version 1.42, which fixes the issue.

Affected products

Apache Software Foundation Apache Calcite: from 1.5.0 before 1.42.0 — fixed in 1.42.0

How to fix

Upgrade to a fixed version: Apache Software Foundation Apache Calcite 1.42.0. Check the vendor advisory for mitigations.

References

https://lists.apache.org/thread/9s37svo343w5ck1ovh478lkzcqk4949v
http://www.openwall.com/lists/oss-security/2026/06/01/7

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