Detect CVE-2026-47668: DbGate Unauthenticated RCE via JSON Script Runner in Splunk
Detects exploitation of CVE-2026-47668, a critical unauthenticated remote code execution vulnerability in dbgate-serve <= 7.1.8. The JSON Script Runner endpoint accepts and executes arbitrary JavaScript/JSON payloads without authentication, allowing attackers to achieve full server compromise. A public PoC is available.
MITRE ATT&CK
- Tactic
- Initial Access Execution Persistence Impact
SPL Detection Query
index=web OR index=proxy OR index=iis sourcetype=access_combined OR sourcetype=iis OR sourcetype=nginx:access
| search (uri_path="*/script/run*" OR uri_path="*/script/execute*" OR uri_path="*/run-script*" OR uri_path="*/api/script*") method=POST
| eval auth_header=if(isnull(cs_Authorization) OR cs_Authorization="-" OR cs_Authorization="", "none", cs_Authorization)
| where auth_header="none"
| eval status_code=coalesce(status, sc_status)
| stats count AS request_count, earliest(_time) AS first_seen, latest(_time) AS last_seen, values(uri_path) AS paths_accessed, values(status_code) AS response_codes BY src_ip, http_user_agent
| eval risk=case(request_count>10, "critical", request_count>3, "high", true(), "medium")
| eval first_seen=strftime(first_seen, "%Y-%m-%d %H:%M:%S"), last_seen=strftime(last_seen, "%Y-%m-%d %H:%M:%S")
| table first_seen, last_seen, src_ip, request_count, paths_accessed, response_codes, risk, http_user_agent
| sort -request_countDetects unauthenticated POST requests to dbgate script runner endpoints via web/proxy/IIS logs. Aggregates by source IP to identify scanning and exploitation attempts.
Data Sources
Required Sourcetypes
False Positives & Tuning
- Legitimate internal API calls from trusted internal networks using the script runner without HTTP auth headers
- Development and staging environments where dbgate runs without authentication by design
- Authorized penetration testing or red team exercises
Other platforms for CVE-2026-47668
Testing Methodology
Validate this detection against 3 adversary techniques from Atomic Red Team. Each test below lists the behaviour to exercise and the telemetry you should expect to see. Executable commands and cleanup steps are available with Pro.
- Test 1CVE-2026-47668 PoC — Unauthenticated Script Execution via curl
Expected signal: HTTP POST to /script/run with JSON body containing require('child_process'); Node.js spawns a child process (execve syscall with ppid=node); file /tmp/pwned.txt created by node process user
- Test 2CVE-2026-47668 — Reverse Shell Payload via Script Runner
Expected signal: Node.js spawns /bin/sh child process; outbound TCP connection from node process to ATTACKER_IP:4444 visible in netflow and EDR network telemetry
- Test 3CVE-2026-47668 — Version Fingerprinting and Endpoint Discovery
Expected signal: Multiple GET and POST requests to dbgate host from single source IP in short succession; POST to /script/run with simple JS payload; file write event from node process
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