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TI-2026-85710 Aliases CVE-2026-102943

Path traversal in Dagu MCP lets attackers read DAG spec files

Priority LOW 29CWE-22Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Information disclosure, Security bypass
Confidentiality · integrity · availability
High · None · None
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-22, CWE-863 and the CVSS impact.

Summary

Dagu before 2.11.0 has a flaw in the MCP dagu_read operation with the dag_spec target. It calls the DAG specification API directly, skipping the HTTP middleware, and the resolver does not limit paths to the DAG directories (CWE-22). An authenticated attacker with a viewer-role API key can read .yaml or .yml files outside those directories that the Dagu process can access. The operation cannot write or execute.

Written with Claude Haiku 5.5 from the sources below · 2026-11-06

Description from the CNA

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00413 35th percentileScored 2026-11-07
Fix Fixed dagu (dagucloud): 2.11.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
daguclouddagubefore 2.11.02.11.0Patch availableCNA
  • dagu Vendordagucloud Affected before 2.11.0 Fixed in 2.11.0 Patch available CNA

Remediation

Upgrade dagu to version 2.11.0, which fixes this issue.

Written with Claude Haiku 5.5 from the sources below · 2026-11-06

  • Fix · CNA dagu (dagucloud) Fixed in 2.11.0

Timeline

  1. 2026-11-05 Threatist record created from CVE-2026-102943
  2. 2026-11-06 CISA SSVC decision points changed
  3. 2026-11-06 Priority changed: MEDIUM → LOW

References

Other 4

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences