Apache DolphinScheduler <3.4.3 Auth Bypass via task-instance API
CVE-2026-66087 Published on October 8, 2026
Apache DolphinScheduler: Project Authorization Bypass in the Task instance stop/savepoint Endpoint
An authorization bypass vulnerability in Apache DolphinScheduler allows authenticated users to operate task instance in projects they are not authorized to access through the
* /dolphinscheduler/projects/{projectCode}/task-instances/{taskInstanceId}/stop
* /dolphinscheduler/projects/{projectCode}/task-instances/{taskInstanceId}/savepoint
This issue affects Apache DolphinScheduler: before 3.4.3.
Users are recommended to upgrade to version 3.4.3, which fixes the issue.
Vulnerability Analysis
CVE-2026-66087 can be exploited with network access, and requires small amount of user privileges. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have a high impact on confidentiality and integrity, and no impact on availability.
Weakness Type
What is an AuthZ Vulnerability?
The software performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check. This allows attackers to bypass intended access restrictions.
CVE-2026-66087 has been classified to as an AuthZ vulnerability or weakness.
Products Associated with CVE-2026-66087
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Affected Versions
Apache Software Foundation Apache DolphinScheduler:- Before 3.4.3 is affected.