Unrated severityOSV Advisory· Published Jan 12, 2026· Updated Jan 12, 2026
CVE-2025-66689
CVE-2025-66689
Description
A path traversal vulnerability exists in Zen MCP Server before 9.8.2 that allows authenticated attackers to read arbitrary files on the system. The vulnerability is caused by flawed logic in the is_dangerous_path() validation function that uses exact string matching against a blacklist of system directories. Attackers can bypass these restrictions by accessing subdirectories of blacklisted paths.
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Affected products
2- Range: v1.1.0, v5.10.0, v5.10.1, …
- Range: <9.8.2
Patches
Vulnerability mechanics
References
2News mentions
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