CVE-2026-3960 — Remote Code Execution
CVE-2026-3960 — 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 dr
What This Means For You
- If your environment is affected by CWE-94, review your exposure and prioritize patching based on your environment. Monitor vendor advisories for CVE-2026-3960 updates and patches.
Related ATT&CK Techniques
🛡️ Detection Rules
3 rules · 6 SIEM formats3 detection rules auto-generated for this incident, mapped to MITRE ATT&CK. Sigma YAML is free — export to any SIEM format via the Intel Bot.
H2O-3 Unauthenticated RCE via ImportSQLTable Endpoint — CVE-2026-3960
Indicators of Compromise
| ID | Type | Indicator |
|---|---|---|
| CVE-2026-3960 | vulnerability | CVE-2026-3960 |
| CWE-94 | weakness | CWE-94 |
Written by SCW Vulnerability Desk
Source & Attribution
| Source Platform | NVD |
| Channel | National Vulnerability Database |
| Published | April 23, 2026 at 13:16 UTC |
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