CVE-2026-66084

Apache DolphinScheduler: Project Authorization Bypass in the Task Definition with-upstream Endpoint

Published Oct 8, 2026 CVSS 3.1 · 8.1 High EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Metrics cvssV3_1

{'score': 8.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N'}

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Apache
Apache dolphinscheduler
Vendors & Products Apache
Apache dolphinscheduler
Type Values Removed Values Added
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.
Title Apache DolphinScheduler: Project Authorization Bypass in the Task Definition with-upstream Endpoint
Weaknesses CWE-863
References
Weaknesses

Sources

Status
PUBLISHED
Assigner
apache
Published
Updated
Oct 8, 2026, 8:20 PM
Reserved
Jul 24, 2026, 2:04 AM
Status
Deferred
Published
Oct 8, 2026, 9:16 AM
Modified
Oct 8, 2026, 9:18 PM