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CVE-2026-27598

Dagu: Path traversal in DAG creation allows arbitrary YAML file write outside DAGs directory

Published: Feb 25, 2026Updated: Feb 25, 2026 Sources: CVE List NVD GHSACWE-22
NVD MITRE
6.5CVSSMEDIUM
EPSS Score
0.6%
Top 57.4%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

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.

CVSS Vector Breakdown

AV:NAC:LPR:LUI:NS:UC:NI:HA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:LPrivileges Required
Low
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:HIntegrity
High
A:NAvailability
None
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Weaknesses

CWE-22

Affected Products

dagudagu-org
dagudagu
github.com/dagu-org/daguGoOSS Libraries
dagu-orgaka dagu
gopackage-ecosystemOSS Libraries

Attack Graph

Products CVE Techniques Tactics

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Exploitability

Official Patch Available

MITRE ATT&CK

2 techniques
Collection
Discovery
View detailed technique mapping

References

https://github.com/dagu-org/dagu/security/advisories/GHSA-6v48-fcq6-ff23
github.com
https://github.com/dagu-org/dagu/commit/e2ed589105d79273e4e6ac8eb31525f765bb3ce4
github.com
https://nvd.nist.gov/vuln/detail/CVE-2026-27598
nvd.nist.gov
and 2 more references View all →

Timeline

Published
Feb 25, 2026
Last Updated
Feb 25, 2026

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