CVE-2026-3960
Remote Code Execution in h2oai/h2o-3
- State
- Published
- Severity
- 5.9 Medium
- Published
- Apr 23, 2026
- Updated
- Apr 23, 2026
- Reserved
- Mar 11, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.0 | 5.9 Medium | CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H | @huntr_ai |
Weaknesses
- CWE-94 Improper Control of Generation of Code
Affected Products
| Product | Versions |
|---|---|
h2oai/h2o-3h2oai |
|
References
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