Witness is an MCP server that integrates with Obsidian to allow AI assistants like Claude to read, write, and organize notes in your vault. It supports file operations, semantic search, and remote access via Cloudflare tunnels.
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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
@modelcontextprotocol/sdk has cross-client data leak via shared server/transport instance reuse
esbuild enables any website to send any requests to the development server and read the response
[](https://m8ven.ai/mcp/jawache-witness-1wysam)