What is CVE-2026-46718?

CVE-2026-46718 is a medium-severity vulnerability in Apache Calcite, classified under Use of Externally-Controlled Input to Select Classes or Code (Unsafe Reflection). CVSS score: 6.5/10. Published 2026-06-02.

How severe is CVE-2026-46718?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Vulnerability in Apache Calcite

CVE-2026-46718

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.

Published 2026-06-02 · last modified 2026-07-22.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.007 (51.8th percentile), scored 2026-10-18.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 52nd percentile — 51.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.004 · newest: 0.007 · change: +0.003

Affected products

Apache Calcite
Apache Software Foundation Calcite — versions 1.5.0

Weakness classification (CWE)

CWE-470 — Use of Externally-Controlled Input to Select Classes or Code (Unsafe Reflection)

References

lists.apache.org/thread/9s37svo343w5ck1ovh478lkzcqk4949v (vendor-advisory, Mailing List, Vendor Advisory)
af854a3a-2127-422b-91ae-364da2661108 (Mailing List, Third Party Advisory)

Frequently asked questions

What is CVE-2026-46718?: CVE-2026-46718 is a medium-severity vulnerability in Apache Calcite, classified under Use of Externally-Controlled Input to Select Classes or Code (Unsafe Reflection). CVSS score: 6.5/10. Published 2026-06-02.
How severe is CVE-2026-46718?: Medium severity. CVSS v3 base score is 6.5 out of 10.