CVE-2026-66084Network attack vectorHinoki check available

Cross-project task modification via mismatched project identifiers

Published Oct 8, 2026 · Updated Oct 8, 2026

Authorization bypass in Apache DolphinScheduler before 3.4.3 allows remote authenticated users to modify tasks through its API. The /dolphinscheduler/projects/{projectCode}/task-definition/{code}/with-upstream endpoint accepts a task code without verifying that it belongs to the supplied project. Access to one authorized project lets attackers modify another project's task definition and upstream dependencies, compromising workflow integrity and disrupting task execution.

CVSS severityUnavailable
Unscored
EPSS probability0.33%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Authorization bypass in Apache DolphinScheduler before 3.4.3 allows remote authenticated users to modify tasks through its API. The /dolphinscheduler/projects/{projectCode}/task-definition/{code}/with-upstream endpoint accepts a task code without verifying that it belongs to the supplied project. Access to one authorized project lets attackers modify another project's task definition and upstream dependencies, compromising workflow integrity and disrupting task execution.

The record

CVE
CVE-2026-66084
Published
Oct 8, 2026
Updated
Oct 8, 2026
Vendor
The Apache Software Foundation
Product
Apache DolphinScheduler
Classifications
CWE-863, T1565.001
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 8, 2026CVE publishedPublication date reported by the CVE source.
  2. Oct 8, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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  1. Affected versionversion=0 <3.4.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

The Apache Software Foundation · Apache DolphinSchedulerversion=0 <3.4.3

Published CVSS scores

No CVSS assessment is available in this record.

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Activity data is delayed. The latest report is Sep 28, 2026.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-863Incorrect Authorization
T1565.001Stored Data Manipulation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

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