# CVE-2026-71899: Apache DolphinScheduler: Missing Authorization in query-dynamic-sub-workflows API Leads to Information Disclosure

> An authenticated user can access workflow data from unauthorized projects due to missing authorization checks in the query-dynamic-sub-workflows API.

- **Severity:** Medium 6.5 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 29 Sep 2026
- **Updated:** 1 Oct 2026
- **Also known as:** GHSA-cmrj-w8v5-mv8v

## What is CVE-2026-71899?

CVE-2026-71899 is a medium-severity missing authorization vulnerability in Apache DolphinScheduler, published on 29 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

A missing authorization vulnerability exists in the `query-dynamic-sub-workflows` API of Apache DolphinScheduler. The API does not properly verify whether the authenticated user has permission to access the workflows being queried.

An authenticated user who does not have permission to access a specific project can invoke the API with parameters referencing workflows belonging to that project and retrieve workflow information. This allows users to access workflow data outside their authorized project scope, resulting in unauthorized information disclosure.

This issue affects Apache DolphinScheduler: from 3.2.0 before 3.4.3.

Users are recommended to upgrade to version 3.4.3, which fixes the issue.

Weakness: CWE-862 (Missing Authorization), CWE-863 (Incorrect Authorization)

## Which versions are affected by CVE-2026-71899?


## How do I fix CVE-2026-71899?

No fix has been published for CVE-2026-71899 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-71899 being exploited?

There is no known exploitation of CVE-2026-71899 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-71899 and fix it if it is affected.

What it is: CVE-2026-71899 is a medium-severity missing authorization vulnerability in Apache DolphinScheduler, published on 29 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-71899 in the wild and no public exploit code.

Affected product: Apache DolphinScheduler. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-71899/ (Markdown: https://insights.sbomify.com/CVE-2026-71899/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-71899
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-71899
- OSV: https://osv.dev/vulnerability/CVE-2026-71899

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From sbomify Insights: https://insights.sbomify.com/CVE-2026-71899/
Summaries are generated and may contain mistakes; the official description above is the record.