High SEVERITY — Vulnerability

CVE-2026-49357 — Line Desktop MCP is a project that, while unaffiliated with the official line-bot-mcp-server, allows users to directly o

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

Platform
Windows Server
CVE Record
CVE-2026-49357
CVSS Score
8.8/10
Published
19 June 2026
Views
40
Primary source: Review the official advisory at nvd.nist.gov Go to Source

Summary

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.

Assessment

  • CVE: CVE-2026-49357
  • CVSS taban puanı: 8.8
  • Vektör: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
  • Kaynak: NVD kaydı

References

Action

  • Etkilenen sistemleri envanterden doğrulayın
  • Üretici yamasını bakım penceresinde uygulayın
  • Yama uygulanana kadar erişimi ağ katmanında kısıtlayın

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