Detect Apache DolphinScheduler DataSource API Missing Authorization - Arbitrary Metadata Disclosure (CVE-2026-32966) in Elastic Security
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
Elastic Detection Query
sequence by source.ip with maxspan=5m
[network where event.category == "network" and event.dataset in ("apache.access", "nginx.access", "iis.access") and
url.path : "*/dolphinscheduler/datasources*" and
http.response.status_code in (200, 201)]
[network where event.category == "network" and event.dataset in ("apache.access", "nginx.access", "iis.access") and
url.path : "*/dolphinscheduler/datasources*" and
http.response.status_code in (200, 201)]EQL sequence rule detecting two or more successful requests to DolphinScheduler DataSource API from the same source IP within 5 minutes, indicating potential CVE-2026-32966 exploitation or reconnaissance.
Data Sources
Required Tables
False Positives & Tuning
- Administrative users performing multiple datasource configuration checks
- Monitoring agents making periodic connectivity validation calls
- Automated test frameworks exercising the DolphinScheduler API
- Load balancers performing upstream health checks on the DolphinScheduler API
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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