What is the CVSS score of EUVD-2026-33906?

EUVD-2026-33906 has a CVSS 3.1 base score of 6.5 (Medium). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N. EPSS exploitation probability: 0.0%.

Is there a patch available for EUVD-2026-33906?

Yes, a patch is available for EUVD-2026-33906. Update the affected software to the latest version immediately.

Apache Calcite EUVD-2026-33906

| CVE-2026-46718 MEDIUM

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

2026-06-02 apache

GHSA-c2rv-hwqm-wjpg

Information Disclosure Apache Red Hat

6.5

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

6.5 MEDIUM

AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

Red Hat

5.4 MEDIUM

qualitative

Primary rating from NVD.

CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

Low

Availability

None

Lifecycle Timeline

Analysis Generated

Jun 02, 2026 - 16:22 vuln.today

CVSS changed

Jun 02, 2026 - 16:22 NVD

6.5 (MEDIUM)

Patch available

Jun 02, 2026 - 11:00 EUVD

CVE Published

Jun 02, 2026 - 09:17 nvd

UNKNOWN (no severity yet)

CVE Published

Jun 02, 2026 - 09:17 nvd

MEDIUM 6.5

Blast Radius

ecosystem impact

† from your stack dependencies † transitive graph · vuln.today resolves 4-path depth

20 maven packages depend on org.apache.calcite:calcite-core (9 direct, 11 indirect)

Ecosystem-wide dependent count for version 1.5.0.

DescriptionCVE.org

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.

AnalysisAI

Unsafe reflection in Apache Calcite 1.5.0 through 1.41 allows unauthenticated remote attackers to supply externally-controlled input that influences class or code selection at runtime, resulting in partial confidentiality and integrity impact (CVSS C:L/I:L). The vulnerability stems from CWE-470, where user-supplied input is used unsanitized to drive Java reflection operations. No public exploit code exists and no active exploitation has been confirmed; EPSS of 0.02% (7th percentile) indicates low community-assessed exploitation probability at time of analysis.

Technical ContextAI

Apache Calcite is a widely embedded SQL query parsing, planning, and optimization framework used as a foundational library by Apache Hive, Flink, Drill, Phoenix, and others. CWE-470 (Use of Externally-Controlled Input to Select Classes or Code) describes a class of vulnerability where attacker-supplied strings are passed to reflective class-loading APIs (e.g., Class.forName(), newInstance()) without adequate allowlisting or validation. This allows an attacker to influence which Java class is instantiated or which code path is invoked. The affected CPE is cpe:2.3:a:apache_software_foundation:apache_calcite:*:*:*:*:*:*:*:*, spanning all releases from 1.5.0 up to but not including 1.42. Because Calcite is typically embedded rather than exposed directly, the practical attack surface depends on how the consuming application exposes Calcite's query or expression parsing interfaces to untrusted input.

RemediationAI

Upgrade Apache Calcite to version 1.42 or later, which contains the vendor-confirmed fix per the Apache mailing list advisory at https://lists.apache.org/thread/9s37svo343w5ck1ovh478lkzcqk4949w and the oss-security disclosure at http://www.openwall.com/lists/oss-security/2026/06/01/7. For downstream projects embedding Calcite as a transitive dependency, update the dependency version in your build configuration (Maven, Gradle) and re-release. If an immediate upgrade is not feasible, a compensating control is to restrict the application layer so that untrusted external input cannot reach Calcite's class-selection or plugin-loading interfaces - for example, by validating and allowlisting any user-supplied type names, function names, or driver class identifiers before they are passed to Calcite. This allowlist approach has the trade-off of requiring ongoing maintenance as legitimate class references change. Blocking network access to query endpoints is not a practical workaround for embedded deployments but can reduce exposure in cases where Calcite-backed REST or JDBC endpoints are publicly reachable.