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.
History

Mon, 14 Sep 2026 21:00:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Fri, 04 Sep 2026 16:15:00 +0000

Type Values Removed Values Added
First Time appeared Haris-musa
Haris-musa excel-mcp-server
Vendors & Products Haris-musa
Haris-musa excel-mcp-server

Fri, 04 Sep 2026 14:45:00 +0000

Type Values Removed Values Added
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.
Title excel-mcp-server 0.1.8 Arbitrary File Read/Write via stdio mode
Weaknesses CWE-22
References
Metrics cvssV3_1

{'score': 9.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'}

cvssV4_0

{'score': 9.3, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N'}


cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published: 2026-09-04T14:32:18.828Z

Updated: 2026-09-14T19:33:09.025Z

Reserved: 2026-09-04T13:32:27.956Z

Link: CVE-2026-85661

cve-icon Vulnrichment

Updated: 2026-09-14T19:24:18.523Z

cve-icon NVD

Status : Deferred

Published: 2026-09-04T15:17:43.643

Modified: 2026-09-23T17:17:45.823

Link: CVE-2026-85661

cve-icon Redhat

No data.