Detect Apache DolphinScheduler DataSource API Missing Authorization - Arbitrary Metadata Disclosure (CVE-2026-32966) in Sumo Logic CSE
Apache DolphinScheduler versions before 3.4.2 contain a missing authorization check in the DataSource API endpoint. An unauthenticated or low-privileged attacker can query data source metadata including connection strings, credentials, hostnames, and database names without appropriate access controls. CVSS 9.8 critical. Public PoC available.
MITRE ATT&CK
- Tactic
- Credential Access Discovery Collection
Sumo Detection Query
_sourceCategory=apache OR _sourceCategory=nginx OR _sourceCategory=iis OR _sourceCategory=web/access
| parse regex "(?<src_ip>\\d{1,3}\\.\\d{1,3}\\.\\d{1,3}\\.\\d{1,3})" nodrop
| parse regex "\"(?:GET|POST|PUT|DELETE|PATCH|HEAD|OPTIONS) (?<uri_path>[^\" ]+)" nodrop
| parse regex "\"\\s(?<status_code>\\d{3})\\s" nodrop
| where uri_path matches "*/dolphinscheduler/datasources*"
| where status_code in ("200", "201")
| timeslice 5m
| stats count as request_count, dcount(uri_path) as distinct_endpoints, values(uri_path) as accessed_paths by src_ip, _timeslice
| where request_count >= 3 or distinct_endpoints >= 2
| if (request_count >= 20, "critical", if (request_count >= 10, "high", if (distinct_endpoints >= 3, "high", "medium"))) as risk_level
| sort by request_count descSumo Logic query detecting abnormal access patterns to Apache DolphinScheduler DataSource API endpoints consistent with CVE-2026-32966 exploitation, using regex parsing on web access logs.
Data Sources
Required Tables
False Positives & Tuning
- Scheduled jobs within DolphinScheduler that validate multiple data source connections
- Administrative scripts enumerating datasources for documentation or auditing
- Web application firewalls or API gateways performing upstream health validation
- Developers testing DolphinScheduler integrations in staging environments sharing log pipelines
Other platforms for CVE-2026-32966
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 1Unauthenticated DolphinScheduler DataSource List Enumeration
Expected signal: HTTP GET request to /dolphinscheduler/datasources/list with no Authorization header; HTTP 200 response containing JSON array of data source objects with connection metadata
- Test 2DolphinScheduler DataSource Credential Extraction via getById
Expected signal: Sequential HTTP GET requests to /dolphinscheduler/datasources/[1-20] from same source IP within 10 seconds; multiple HTTP 200 responses; high distinct_endpoints count
- Test 3DolphinScheduler DataSource Verify Endpoint Credential Probe
Expected signal: HTTP POST to /dolphinscheduler/datasources/verify with JSON body containing credential parameters; outbound TCP connection from DolphinScheduler host to TARGET_DB_HOST:3306
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