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1 vulnerability by dagu-org

CVE-2026-27598 (GCVE-0-2026-27598)

Vulnerability from cvelistv5 – Published: 2026-02-25 00:27 – Updated: 2026-02-25 00:27
VLAI?
Title
Dagu: Path traversal in DAG creation allows arbitrary YAML file write outside DAGs directory
Summary
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.
Severity ?
7.1 (High)
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
CWE
  • CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Assigner
References
Impacted products
Vendor Product Version
dagu-org dagu Affected: <= 1.16.7
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "product": "dagu",
          "vendor": "dagu-org",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c= 1.16.7"
            }
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        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "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."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "NETWORK",
            "baseScore": 7.1,
            "baseSeverity": "HIGH",
            "privilegesRequired": "NONE",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "PASSIVE",
            "vectorString": "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",
            "version": "4.0",
            "vulnAvailabilityImpact": "NONE",
            "vulnConfidentialityImpact": "NONE",
            "vulnIntegrityImpact": "HIGH"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-22",
              "description": "CWE-22: Improper Limitation of a Pathname to a Restricted Directory (\u0027Path Traversal\u0027)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-02-25T00:27:40.654Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/dagu-org/dagu/security/advisories/GHSA-6v48-fcq6-ff23",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/dagu-org/dagu/security/advisories/GHSA-6v48-fcq6-ff23"
        },
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          "name": "https://github.com/dagu-org/dagu/commit/e2ed589105d79273e4e6ac8eb31525f765bb3ce4",
          "tags": [
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          "url": "https://github.com/dagu-org/dagu/commit/e2ed589105d79273e4e6ac8eb31525f765bb3ce4"
        }
      ],
      "source": {
        "advisory": "GHSA-6v48-fcq6-ff23",
        "discovery": "UNKNOWN"
      },
      "title": "Dagu: Path traversal in DAG creation allows arbitrary YAML file write outside DAGs directory"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-27598",
    "datePublished": "2026-02-25T00:27:40.654Z",
    "dateReserved": "2026-02-20T19:43:14.602Z",
    "dateUpdated": "2026-02-25T00:27:40.654Z",
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