# CVE-2026-66083: Apache DolphinScheduler authorization bypass in datasources endpoint

Source: https://junglewise.ai/threats/cve-2026-66083-the-datasources-unauth-datasource-endpoint-does-not-properly  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-09-29. Updated: 2026-09-29  
License: CC BY 4.0 with a link back

CVE-2026-66083 · Severity: info · Published 2026-09-29

Apache DolphinScheduler is a workflow orchestration platform used to schedule and manage data processing tasks. An authentication flaw in the /datasources/unauth-datasource endpoint allows authenticated users to access configuration information about data sources they should not have permission to view, potentially exposing database credentials and connection details.

Technologies: [Apache DolphinScheduler](https://junglewise.ai/threats/technologies/apache-dolphinscheduler-1). Vendors: [Apache](https://junglewise.ai/threats/vendors/apache).

## Quick answers

**Is CVE-2026-66083 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-66083 being exploited in the wild.

**How severe is CVE-2026-66083?** Informational severity, published 29 September 2026.

**Which products and versions are affected?** Apache DolphinScheduler before 3.4.3.

**Is there a fix for CVE-2026-66083?** A patch was published on 2026-09-29: fix available in version 3.4.3 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-66083 attacked?** It is attacked over the network, in a hosted service.

**Am I affected by CVE-2026-66083?** Check whether you run Apache DolphinScheduler at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

The /datasources/unauth-datasource endpoint fails to properly enforce authorization checks, allowing an authenticated attacker to retrieve sensitive metadata about restricted data sources. The vulnerability requires user authentication and network access to the API endpoint. An attacker can enumerate and extract data source configurations, including connection strings and credentials.

## Affected products

- Apache DolphinScheduler before 3.4.3

## Timeline

- 2026-09-29: disclosed
- 2026-09-29: patched: fix available in version 3.4.3

## References

- [https://repo.maven.apache.org/maven2](https://repo.maven.apache.org/maven2)
- [https://lists.apache.org/thread/b6brfom0jmy9kdt40qrn6dq0x4v2wxdr](https://lists.apache.org/thread/b6brfom0jmy9kdt40qrn6dq0x4v2wxdr)

## Related threats

- [Apache DolphinScheduler improper authorization in sub-workflow tasks](https://junglewise.ai/threats/cve-2026-81569-an-improper-authorization-vulnerability-exists-in-the-handling-of)
- [Apache DolphinScheduler authentication bypass in Actuator endpoints](https://junglewise.ai/threats/cve-2026-78214-an-authentication-bypass-vulnerability-exists-in-the-protection)
- [Apache DolphinScheduler authorization bypass in query-dynamic-sub-workflows API](https://junglewise.ai/threats/cve-2026-71899-a-missing-authorization-vulnerability-exists-in-the-query-dynamic)
- [Apache DolphinScheduler authorization check bypass](https://junglewise.ai/threats/cve-2026-71898-an-incorrect-authorization-check-in-apache-dolphinscheduler)
- [Apache DolphinScheduler improper authorization check in batch endpoints](https://junglewise.ai/threats/cve-2026-71897-an-improper-authorization-check-in-apache-dolphinscheduler-allows)