CVE-2026-102943

MEDIUM 6.5

Dagu MCP DAG specification read bypasses path containment and workspace isolation

CVSS Score

6.5

EPSS Score

0.0%

EPSS Percentile

0th

Dagu is a workflow engine with a built-in Web user interface. Prior to version 2.11.0, its MCP dagu_read operation with target dag_spec invokes the DAG specification API directly, bypassing the HTTP middleware introduced for CVE-2026-33344. The underlying resolver does not restrict resolved paths to configured DAG directories. An authenticated attacker with a viewer-role API key can supply an absolute or traversing path to read .yaml or .yml files outside those directories that are accessible to the Dagu process. The affected operation does not provide write or execution capability. This issue is fixed in version 2.11.0.

CWE	CWE-22 CWE-863
Vendor	dagucloud
Product	dagu
Published	Nov 5, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

None

Affected Versions

dagucloud / dagu

< 2.11.0

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/dagucloud/dagu/security/advisories/GHSA-5m6c-38r8-5w76 github.com: https://github.com/dagucloud/dagu/pull/2424 github.com: https://github.com/dagucloud/dagu/commit/c15c5406bb7b9551f94ab276705f9fd1cebbf2d2 github.com: https://github.com/dagucloud/dagu/releases/tag/v2.11.0