CVE-2026-85661
Last modified
CVE-2026-85661 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. 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.. EPSS estimates a 0.44% chance of exploitation in the next 30 days.
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.
Metrics
Weakness Enumeration
Affected Software
Source: CNA advisory (CVE.org). NVD analysis pending.
| Vendor | Product | Versions |
|---|---|---|
| haris-musa | excel-mcp-server | <= 0.1.8 |
References
Timeline
- Published
- Last Modified
- Status
- Deferred
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