Vulnerability Description
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 Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Bx33661 | Wireshark Mcp | <= 1.1.5 |
Related Weaknesses (CWE)
References
- https://github.com/bx33661/Wireshark-MCP/security/advisories/GHSA-3r68-x3xc-rxpgExploitMitigationPatch
- https://github.com/bx33661/Wireshark-MCP/security/advisories/GHSA-3r68-x3xc-rxpgExploitMitigationPatch
FAQ
What is CVE-2026-43901?
CVE-2026-43901 is a vulnerability with a CVSS score of 6.8 (MEDIUM). 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...
How severe is CVE-2026-43901?
CVE-2026-43901 has been rated MEDIUM with a CVSS base score of 6.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-43901?
Check the references section above for vendor advisories and patch information. Affected products include: Bx33661 Wireshark Mcp.