CVE-2026-49357
CVE-2026-49357 · Streamable HTTP mode exposes LINE Desktop read/send tools without MCP authentication
This page contains facts from public vulnerability sources. Check the original advisory before updating.
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.
CVSS 8.8 · High · EPSS 0.6% · Fix available
- Published
- Updated
Stack: node
Affected products and versions
line-desktop-mcp
- Versions
- < 1.1.2: Affected
No fix published
line-desktop-mcp npm
- Affected ranges
- SEMVER: < 1.1.2
Update to 1.1.2