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CVE-2026-5327— efforthye fast-filesystem-mcp index.ts handleGetDiskUsage command injection

Quick assessment

Affected
efforthye fast-filesystem-mcp
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

fast-filesystem-mcp是efforthye个人开发者的一个模型上下文协议服务器。 fast-filesystem-mcp 3.5.1及之前版本存在命令注入漏洞，该漏洞源于文件src/index.ts中函数handleGetDiskUsage存在命令注入，可能导致远程攻击。

CVSS 6.3 · Medium EPSS 1.11% · P63

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-5327

Vulnerability Information
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Vulnerability Title
efforthye fast-filesystem-mcp index.ts handleGetDiskUsage command injection
Source: CVE Program / CVE List V5
Vulnerability Description
A security flaw has been discovered in efforthye fast-filesystem-mcp up to 3.5.1. The affected element is the function handleGetDiskUsage of the file src/index.ts. Performing a manipulation results in command injection. The attack is possible to be carried out remotely. The exploit has been released to the public and may be used for attacks. The project was informed of the problem early through an issue report but has not responded yet.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
在命令中使用的特殊元素转义处理不恰当(命令注入)
Source: CVE Program / CVE List V5
Vulnerability Title
fast-filesystem-mcp 命令注入漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
fast-filesystem-mcp是efforthye个人开发者的一个模型上下文协议服务器。 fast-filesystem-mcp 3.5.1及之前版本存在命令注入漏洞，该漏洞源于文件src/index.ts中函数handleGetDiskUsage存在命令注入，可能导致远程攻击。
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
efforthye fast-filesystem-mcp 3.5.0 cpe:2.3:a:efforthye:fast-filesystem-mcp:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-5327

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III. Intelligence Information for CVE-2026-5327

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Vendor Advisories for CVE-2026-5327 (2)

Other References for CVE-2026-5327 (1)

Other References for CVE-2026-5327 (1)

IV. Related Vulnerabilities

Same weakness: CWE-77

V. Comments for CVE-2026-5327

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