Apache DolphinScheduler: Authorization bypass in task instance stop and savepoint
Summary
An authorization bypass in Apache DolphinScheduler allows an authenticated user to stop or create savepoints for task instances in projects they are not authorized to access. The flaw is in the /stop and /savepoint task-instance API endpoints. Exploitation requires a valid low-privilege account on the platform, and the realistic impact is disruption of other teams' running tasks and failed data jobs.
Affected
- Apache DolphinScheduler before 3.4.3
- Vulners/OSV lists a narrower range (dolphinscheduler-dist 3.4.0 to 3.4.2); Apache's statement 'before 3.4.3' is authoritative, so all versions below 3.4.3 are treated as affected.
Fixed in
- Upgrade to Apache DolphinScheduler 3.4.3 or later.
Workaround
- Unknown. No vendor workaround is published.
Exploitation
- Known exploited: No (per the sources reviewed).
- CISA KEV: not listed (per Rapid7).
- EPSS: 0% (per Rapid7).
- Public proof of concept: none found in the research; this does not prove none exists.
- CISA SSVC: Exploitation none, Automatable no, Technical Impact total.
Our recommendation
- Inventory all DolphinScheduler instances and their versions.
- Upgrade to 3.4.3 or later, testing first in a non-production environment.
- Review accounts with access to shared instances and restrict them to the projects they need.
- Check task-instance logs for unexpected stop or savepoint actions.
- Restrict network access to the web/API port to known users.
- Re-check the NVD record and the Apache advisory for the final CVSS vector; sources disagree on the vector (8.1 in both, but different impact metrics).
Public exploits
PoC-in-GitHub, Metasploit and Exploit-DB list nothing for this CVE.
Research sources
- CVE Record (Apache post, oss-security) www.openwall.com
- Apache dev mailing list announcement www.mail-archive.com
- Apache lists thread lists.apache.org
- Rapid7 vulnerability database www.rapid7.com
- VulDB vuldb.com
- Feedly Apache security advisories 2026-10-08 feedly.com
- Release notes 3.4.3 newreleases.io
Researched and written up in English and German by an AI (Claude by Anthropic) based on NVD, CISA, EPSS and the sources listed. The vendor information is authoritative. Researched on 1 Nov 2026, 20:34.
Original description (NVD)
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.
Sources
The tracker combines official, freely usable data sources – updated continuously:
- NVD (NIST) – CVEs, rating (CVSS), affected products
- CISA KEV – vulnerabilities confirmed by CISA as actively exploited
- CISA Vulnrichment – CISA assessment (SSVC) in the official CVE record
- FIRST EPSS – probability of exploitation
- Microsoft MSRC – Patch Tuesday: vulnerabilities, severity, updates
- PoC-in-GitHub – public proof-of-concept repositories
- Metasploit (Rapid7) – modules of the Metasploit Framework
- Exploit-DB (OffSec) – archive of public exploits (links only)
- Patch days: official vendor pages (linked per vendor) (Vendor patch days)
This product uses data from the NVD API but is not endorsed or certified by the NVD. EPSS data © FIRST.org.
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