Detect Apache DolphinScheduler DataSource API Missing Authorization - Arbitrary Metadata Disclosure (CVE-2026-32966) in CrowdStrike LogScale
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
LogScale Detection Query
#event_simpleName=NetworkReceiveAcceptIP OR #event_simpleName=NetworkConnectIP
| CommandLine = /dolphinscheduler/
| HttpPath = "*/dolphinscheduler/datasources*"
| HttpStatusCode in (200, 201)
| groupBy([RemoteAddressIP4, HttpPath, HttpStatusCode], function=[
count(aid, as=request_count),
min(@timestamp, as=first_seen),
max(@timestamp, as=last_seen),
collect(HttpPath, as=endpoints_accessed)
])
| where request_count >= 3
| eval risk = if(request_count >= 20, "critical", if(request_count >= 10, "high", "medium"))
| sort(request_count, order=desc)
| select(RemoteAddressIP4, request_count, endpoints_accessed, HttpStatusCode, risk, first_seen, last_seen)CrowdStrike Falcon LogScale/CQL query identifying hosts generating multiple HTTP 200/201 responses to DolphinScheduler DataSource API paths, targeting endpoints vulnerable to CVE-2026-32966 missing authorization.
Data Sources
Required Tables
False Positives & Tuning
- Legitimate DolphinScheduler API clients performing batch data source operations
- Red team exercises with active CrowdStrike monitoring in place
- Automated DevOps pipelines provisioning data sources during environment setup
- Scheduled DolphinScheduler internal jobs scanning available data sources for task execution
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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