CVE-2026-3960
Description
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.
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LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
ai.h2o:h2o-coreMaven | < 3.46.0.10 | 3.46.0.10 |
Affected products
2Patches
Vulnerability mechanics
References
4- github.com/h2oai/h2o-3/commit/b9ae2d3c5220db2dc53753357a783e590364d044nvdPatchWEB
- huntr.com/bounties/6954fe04-b905-453f-8c53-205ac8377e0dnvdExploitThird Party AdvisoryWEB
- github.com/advisories/GHSA-qmcv-hh7c-3m56ghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2026-3960ghsaADVISORY
News mentions
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