Apache DolphinScheduler up to 3.4.2 Data Source Authorization unauth-datasource improper authorization

Summaryinfo

A vulnerability, which was classified as problematic, has been found in Apache DolphinScheduler up to 3.4.2. This vulnerability affects unknown code of the file /datasources/unauth-datasource of the component Data Source Authorization. The manipulation leads to improper authorization. This vulnerability is listed as CVE-2026-66083. The attack may be initiated remotely. There is no available exploit. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in Apache DolphinScheduler up to 3.4.2. This issue affects an unknown functionality of the file /datasources/unauth-datasource of the component Data Source Authorization. The manipulation with an unknown input leads to a improper authorization vulnerability. Using CWE to declare the problem leads to CWE-285. The product does not perform or incorrectly performs an authorization check when an actor attempts to access a resource or perform an action. Impacted is confidentiality. The summary by CVE is:

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.

The advisory is shared at lists.apache.org. The identification of this vulnerability is CVE-2026-66083 since 07/24/2026. The exploitation is known to be easy. The attack may be initiated remotely. Technical details are known, but no exploit is available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 09/29/2026). MITRE ATT&CK project uses the attack technique T1548.002 for this issue.

Upgrading to version 3.4.3 eliminates this vulnerability.

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Productinfo

Type

• Social Network Software

Vendor

• Apache

Name

• DolphinScheduler

Version

• 3.4.0
• 3.4.1
• 3.4.2

License

• open-source

Website

• Vendor: https://www.apache.org/

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