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Wednesday, 28 October 2026
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Incident database

CVE-2026-43901: Wireshark MCP server allows arbitrary export path via unsandboxed tool

Wireshark-MCP versions 1.1.5 and earlier expose a wireshark_export_objects MCP tool that passes an attacker-controlled dest_dir parameter to tshark's --export-objects flag without mandatory path restriction. Because the path sandbox is disabled unless WIRESHARK_MCP_ALLOWED_DIRS is set, a default installation permits exporting files to any directory on the filesystem.

Disclosed 11 May 2026 · Record updated 1 October 2026

Impact

An attacker able to invoke the MCP tool can direct tshark to write exported objects to any directory on the host filesystem in a default installation.

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Sources

  1. nvd.nist.govhttps://nvd.nist.gov/vuln/detail/CVE-2026-43901