CVE-2026-43901— Wireshark MCP: Arbitrary file write via export_objects when WIRESHARK_MCP_ALLOWED_DIRS is not configured
Possible ATT&CK Techniques 1AI
T1059 · Command and Scripting InterpreterAffected Version Matrix 1
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| bx33661 | Wireshark-MCP | <= 1.1.5 | affected |
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I. Basic Information for CVE-2026-43901
Vulnerability Information
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Vulnerability Title
Wireshark MCP: Arbitrary file write via export_objects when WIRESHARK_MCP_ALLOWED_DIRS is not configured
Source: NVD (National Vulnerability Database)
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.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
对路径名的限制不恰当(路径遍历)
Source: NVD (National Vulnerability Database)
Vulnerability Title
Wireshark MCP 路径遍历漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Wireshark MCP是Bpple个人开发者的一款网络数据包智能分析工具。 Wireshark MCP 1.1.5及之前版本存在路径遍历漏洞，该漏洞源于wireshark_export_objects MCP工具接受攻击者控制的dest_dir参数并将其传递给tshark的--export-objects标志而无强制路径限制，路径沙箱默认为None且仅当显式设置环境变量WIRESHARK_MCP_ALLOWED_DIRS时才激活，在默认安装中文件系统上的任何目录都可用作导出目标。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| bx33661 | Wireshark-MCP | <= 1.1.5 | - |
II. Public POCs for CVE-2026-43901
| # | POC Description | Source Link | Shenlong Link |
|---|
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IV. Related Vulnerabilities
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V. Comments for CVE-2026-43901
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