CVE-2026-85661: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') in haris-musa excel-mcp-server
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.
CVE-2026-85661: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') in haris-musa excel-mcp-server
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.
CVSS v4.0
Score 9.3critical
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulnCheck
- Date Reserved
- 2026-09-04T13:32:27.956Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a9adb43acd9273b49bef54d
Added to database: 09/04/2026, 14:52:51 UTC
Last updated: 09/05/2026, 00:32:19 UTC
Views: 10
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