CVE-2026-43901
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.
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Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
wireshark-mcpPyPI | <= 1.1.5 | — |
Affected products
1Patches
Vulnerability mechanics
References
3- github.com/bx33661/Wireshark-MCP/security/advisories/GHSA-3r68-x3xc-rxpgnvdExploitMitigationPatchVendor AdvisoryWEB
- github.com/advisories/GHSA-3r68-x3xc-rxpgghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2026-43901ghsaADVISORY
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