CVE-2026-66083: Apache DolphinScheduler: Unauthorized Disclosure of Data Source Information via /datasources/unauth-datasource

Severity: medium (CVSS 6.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-09-29 · updated 2026-10-06
Weakness: CWE-306

Description

The /datasources/unauth-datasource endpoint does not properly enforce data source authorization. An authenticated user can invoke this endpoint to obtain information about data sources they are not authorized to access. This may expose data source configuration and other sensitive metadata, depending on the fields returned by the endpoint. This issue affects Apache DolphinScheduler: before 3.4.3. Users are recommended to upgrade to version 3.4.3, which fixes the issue.

Affected products

Apache Software Foundation Apache DolphinScheduler: before 3.4.3 — fixed in 3.4.3

How to fix

Upgrade to a fixed version: Apache Software Foundation Apache DolphinScheduler 3.4.3. Check the vendor advisory for mitigations.

References

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