dagu-org dagu up to 1.16.7 API Endpoint /api/v1/dags CreateNewDAG path traversal

Summaryinfo

A vulnerability was found in dagu-org dagu up to 1.16.7. It has been rated as critical. This impacts the function CreateNewDAG of the file /api/v1/dags of the component API Endpoint. Performing a manipulation results in path traversal. This vulnerability is reported as CVE-2026-27598. The attack is possible to be carried out remotely. No exploit exists. It is suggested to install a patch to address this issue.

Detailsinfo

A vulnerability classified as critical has been found in dagu-org dagu up to 1.16.7. This affects the function CreateNewDAG of the file /api/v1/dags of the component API Endpoint. The manipulation with an unknown input leads to a path traversal vulnerability. CWE is classifying the issue as CWE-22. The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. This is going to have an impact on integrity, and availability. The summary by CVE is:

Dagu is a workflow engine with a built-in Web user interface. In versions up to and including 1.16.7, the `CreateNewDAG` API endpoint (`POST /api/v1/dags`) does not validate the DAG name before passing it to the file store. An authenticated user with DAG write permissions can write arbitrary YAML files anywhere on the filesystem (limited by the process permissions). Since dagu executes DAG files as shell commands, writing a malicious DAG to the DAGs directory of another instance or overwriting config files can lead to remote code execution. Commit e2ed589105d79273e4e6ac8eb31525f765bb3ce4 fixes the issue.

The advisory is shared at github.com. This vulnerability is uniquely identified as CVE-2026-27598 since 02/20/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1006 for this issue.

Applying the patch e2ed589105d79273e4e6ac8eb31525f765bb3ce4 is able to eliminate this problem. The bugfix is ready for download at github.com.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Vendor

• dagu-org

Name

• dagu

Version

• 1.16.0
• 1.16.1
• 1.16.2
• 1.16.3
• 1.16.4
• 1.16.5
• 1.16.6
• 1.16.7

License

• open-source

Website

• Product: https://github.com/dagu-org/dagu/

CPE 2.3info

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CPE 2.2info

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Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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