mcpwall is a deterministic security proxy for MCP tool calls — iptables for MCP. It sits between the MCP client and server, intercepting every JSON-RPC request and enforcing YAML-defined policies.
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Disclosed vulnerabilities in this server's declared npm dependencies (via OSV). Whether each is reachable depends on the installed versions.
When Vitest UI server is listening, arbitrary file can be read and executed
minimatch ReDoS: nested *() extglobs generate catastrophically backtracking regular expressions
minimatch has a ReDoS via repeated wildcards with non-matching literal in pattern
minimatch has ReDoS: matchOne() combinatorial backtracking via multiple non-adjacent GLOBSTAR segments
yaml is vulnerable to Stack Overflow via deeply nested YAML collections
[](https://m8ven.ai/mcp/behrensd-mcpwall-ppwkry)