CVE-2026-43901

Wireshark MCP is an MCP Server that turns tshark into a structured analysis interface, then layers in optional Wireshark suite utilities. In 1.1.5 and earlier, wireshark-mcp exposes a wireshark_export_objects MCP tool that accepts an attacker-controlled dest_dir parameter and passes it to tshark's --export-objects flag with no mandatory path restriction. The path sandbox (_allowed_dirs) is None by default and only activates when the environment variable WIRESHARK_MCP_ALLOWED_DIRS is explicitly set. In a default installation, any directory on the filesystem can be used as the export destination.

CVSS v3 6.8 MEDIUM

6.8^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 1.6 / Impact : 5.2

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/bx33661/Wireshark-MCP/security/advisories/GHSA-3r68-x3xc-rxpg	Exploit Mitigation Patch Vendor Advisory
https://github.com/bx33661/Wireshark-MCP/security/advisories/GHSA-3r68-x3xc-rxpg	Exploit Mitigation Patch Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:bx33661:wireshark_mcp:*:*:*:*:*:*:*:*

History

26 Oct 2026, 18:10

Type	Values Removed	Values Added
Summary		(es) Wireshark MCP es un servidor MCP que convierte tshark en una interfaz de análisis estructurado, y luego incorpora utilidades opcionales de la suite Wireshark. En 1.1.5 y versiones anteriores, wireshark-mcp expone una herramienta MCP wireshark_export_objects que acepta un parámetro dest_dir controlado por el atacante y lo pasa al indicador --export-objects de tshark sin ninguna restricción de ruta obligatoria. La sandbox de ruta (_allowed_dirs) es None por defecto y solo se activa cuando la variable de entorno WIRESHARK_MCP_ALLOWED_DIRS se establece explícitamente. En una instalación por defecto, cualquier directorio en el sistema de archivos puede ser utilizado como destino de exportación.

Information

Published : 2026-05-11 23:20

Updated : 2026-10-26 18:10

NVD link : CVE-2026-43901

Mitre link : CVE-2026-43901

CVE.ORG link : CVE-2026-43901

JSON object : View

Products Affected

bx33661

wireshark_mcp

CWE

CWE-22

Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

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