CVE-2026-66084 Apache DolphinScheduler - Authorization Bypass

Apache DolphinScheduler < 3.4.3 contains an authorization bypass caused by improper verification of task definition ownership in the /dolphinscheduler/projects/{projectCode}/task-definition/{code}/with-upstream endpoint, letting authenticated users modify task definitions in unauthorized projects, exploit requires user authentication.

CVSS base score 8.1 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Required
EPSS
0.33% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Authorization Bypass
Impact
Broken Access Control
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
Published
8 October 2026
Updated
15 October 2026
Weakness
CWE-863

Vendor fix

Upgrade to version 3.4.3.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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