CVE-2026-85661 — excel-mcp-server 0.1.8 Arbitrary File Read/Write via stdio mode
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…
Published: 2026-09-04 · CVSS: 9.3 · CVSS 4.0
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 · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7