CVE-2026-66084 Apache DolphinScheduler: Project Authorization Bypass in the Task Definition with-upstream Endpoint
Authenticated users can modify task definitions in unauthorized projects by bypassing project access checks, compromising workflow integrity.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-66084?
CVE-2026-66084 is a high-severity missing authorization vulnerability in Apache DolphinScheduler, published on 8 Oct 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
An authorization bypass vulnerability in Apache DolphinScheduler allows authenticated users to modify task definitions in projects they are not authorized to access through the /dolphinscheduler/projects/{projectCode}/task-definition/{code}/with-upstream endpoint.
The endpoint fails to verify that the task definition identified by code belongs to the project specified by projectCode. An authenticated user can supply the code of a project they are authorized to access together with a task definition code from another project, bypassing project access restrictions and modifying the target task definition and its upstream dependencies.
This vulnerability can compromise workflow integrity and disrupt task execution in unauthorized projects.This issue affects Apache DolphinScheduler: before 3.4.3.
Users are recommended to upgrade to version 3.4.3, which fixes the issue.
Weakness: CWE-863
Which versions are affected by CVE-2026-66084?
How do I fix CVE-2026-66084?
No fix has been published for CVE-2026-66084 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-66084 being exploited?
There is no known exploitation of CVE-2026-66084 in the wild and no public exploit code.
Sources
Also known as GHSA-26vh-p5jc-q2mg.