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.
History

Wed, 25 Feb 2026 12:00:00 +0000

Type Values Removed Values Added
First Time appeared Dagu-org
Dagu-org dagu
Vendors & Products Dagu-org
Dagu-org dagu

Wed, 25 Feb 2026 01:00:00 +0000

Type Values Removed Values Added
Description 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.
Title Dagu: Path traversal in DAG creation allows arbitrary YAML file write outside DAGs directory
Weaknesses CWE-22
References
Metrics cvssV4_0

{'score': 7.1, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N'}


cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published: 2026-02-25T00:27:40.654Z

Updated: 2026-02-25T00:27:40.654Z

Reserved: 2026-02-20T19:43:14.602Z

Link: CVE-2026-27598

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-02-25T01:16:09.157

Modified: 2026-02-25T14:15:29.980

Link: CVE-2026-27598

cve-icon Redhat

No data.