Streamable HTTP mode exposes LINE Desktop read/send tools without MCP authentication
Description
Line Desktop MCP is a project that, while unaffiliated with the official line-bot-mcp-server, allows users to directly operate the LINE Desktop application on Windows or Mac via MCP. line-desktop-mcp supports a --http-mode Streamable HTTP transport for use with clients such as n8n. In this mode the server binds to 0.0.0.0 and exposes the MCP /mcp endpoint without an MCP-layer authentication check. Prior to version 1.1.2, any network client that can reach the port can initialize a session, list tools, and call tools that read LINE Desktop chat history or send LINE messages through the already logged-in desktop application. Version 1.1.2 fixes the issue.
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Affected products
1- Range: <1.1.2
Patches
Vulnerability mechanics
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References
2- github.com/dtwang/line-desktop-mcp/commit/680617894981ea93f8f6ceb51ecde7519754d501mitrex_refsource_MISC
- github.com/dtwang/line-desktop-mcp/security/advisories/GHSA-4hf8-5mjm-rfgqmitrex_refsource_CONFIRM
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