What is CVE-2026-66083?

CVE-2026-66083 is a medium-severity vulnerability in Apache Software Foundation Dolphinscheduler, classified under Missing Authentication for Critical Function. CVSS score: 6.5/10. Published 2026-09-29.

How severe is CVE-2026-66083?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Auth bypass in Apache Software Foundation Dolphinscheduler

CVE-2026-66083

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.

Vulnerability class: Broken Authentication

Published 2026-09-29 · last modified 2026-09-29.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Apache Software Foundation Dolphinscheduler

Weakness classification (CWE)

CWE-306 — Missing Authentication for Critical Function

References

lists.apache.org/thread/b6brfom0jmy9kdt40qrn6dq0x4v2wxdr (vendor-advisory)
af854a3a-2127-422b-91ae-364da2661108

Frequently asked questions

What is CVE-2026-66083?: CVE-2026-66083 is a medium-severity vulnerability in Apache Software Foundation Dolphinscheduler, classified under Missing Authentication for Critical Function. CVSS score: 6.5/10. Published 2026-09-29.
How severe is CVE-2026-66083?: Medium severity. CVSS v3 base score is 6.5 out of 10.