How severe is CVE-2026-27598?

CVE-2026-27598 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.

Is CVE-2026-27598 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (43rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-27598?

CVE-2026-27598 affects Dagu. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-27598?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-27598 have an EU (EUVD) identifier?

Yes. CVE-2026-27598 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-8576.

When was CVE-2026-27598 published?

CVE-2026-27598 was published on 2026-02-25 and last updated on 2026-06-17.

CVE-2026-27598

CVE-2026-27598 is a medium-severity vulnerability in Dagu with a CVSS 3.x base score of 6.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-22.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
CVSS v4: 7.1
EPSS exploit prediction: 1% (43rd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-8576
Weakness: CWE-22
Affected product: Dagu
Published: 2026-02-25
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2026-27598?: 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.
How severe is CVE-2026-27598?: CVE-2026-27598 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.
Is CVE-2026-27598 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (43rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-27598?: CVE-2026-27598 affects Dagu. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-27598?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-27598 have an EU (EUVD) identifier?: Yes. CVE-2026-27598 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-8576.
When was CVE-2026-27598 published?: CVE-2026-27598 was published on 2026-02-25 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:dagu:dagu:*:*:*:*:*:*:*:*

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