VULNERABILITY INTELLIGENCE
CVE-2026-85661
CVSS score9.8 CRITICAL
EPSS probability0.69%
CISA KEVNot currently listed
Published2026-09-04
Last modified2026-09-23
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
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.
Weakness classification
- disclosure@vulncheck.com: CWE-22