Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1336 CNY

100%
Buy Us a Coffee

CVE-2026-85661— excel-mcp-server 0.1.8 Arbitrary File Read/Write via stdio mode

Quick assessment

Affected
haris-musa excel-mcp-server
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.

Haris Excel MCP Server是Haris个人开发者的一款连接人工智能模型与电子表格操作的服务器软件。 Haris Excel MCP Server 0.1.8版本存在路径遍历漏洞，该漏洞源于在stdio模式且未设置EXCEL_FILES_PATH时未强制执行路径限制，可能导致攻击者读取和写入任意文件。

CVSS 9.8 · Critical EPSS 0.44% · P38

Affected Version Matrix 1

VendorProduct Version RangeStatus
haris-musa excel-mcp-server ≤ 0.1.8 affected
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-85661

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
excel-mcp-server 0.1.8 Arbitrary File Read/Write via stdio mode
Source: CVE Program / CVE List V5
Vulnerability Description
excel-mcp-server 0.1.8 fails to enforce path confinement in stdio mode when EXCEL_FILES_PATH is unset, allowing attackers to read and write arbitrary files. Attackers can supply unchecked file paths to read and write tools to access any file accessible to the process.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
对路径名的限制不恰当(路径遍历)
Source: CVE Program / CVE List V5
Vulnerability Title
Haris Excel MCP Server 路径遍历漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Haris Excel MCP Server是Haris个人开发者的一款连接人工智能模型与电子表格操作的服务器软件。 Haris Excel MCP Server 0.1.8版本存在路径遍历漏洞，该漏洞源于在stdio模式且未设置EXCEL_FILES_PATH时未强制执行路径限制，可能导致攻击者读取和写入任意文件。
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
haris-musa excel-mcp-server 0 ~ 0.1.8 -

II. Public POCs for CVE-2026-85661

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-85661

请登录查看更多情报信息。

Vendor Advisories for CVE-2026-85661 (1)

Proof of Concept for CVE-2026-85661 (2)

Other References for CVE-2026-85661 (1)

IV. Related Vulnerabilities

Same product: excel-mcp-server
Same vendor: haris-musa
Same weakness: CWE-22

V. Comments for CVE-2026-85661

No comments yet

Leave a comment