cvedb.io
CVE-2026-3960
CRITICAL · CVSS 9.8
EPSS exploitation probability: 0%
Published 2026-04-23T10:16:17.813 · Last modified 2026-06-17T10:44:31.060

Summary

A critical remote code execution vulnerability exists in the unauthenticated REST API endpoint /99/ImportSQLTable in H2O-3 version 3.46.0.9 and prior. The vulnerability arises due to insufficient security controls in the parameter blacklist mechanism, which only targets MySQL JDBC driver-specific dangerous parameters. An attacker can bypass these controls by switching the JDBC URL protocol to jdbc:postgresql: and exploiting PostgreSQL JDBC driver-specific parameters such as socketFactory and socketFactoryArg. This allows unauthenticated attackers to execute arbitrary code on the H2O-3 server with the privileges of the H2O-3 process. The issue is resolved in version 3.46.0.10.

Affected products

h2o — h2o

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References

This product uses data from the NVD API but is not endorsed or certified by the NVD. Informational only; not professional security advice.