CVE-2026-49357

UNKNOWN 0.0

Streamable HTTP mode exposes LINE Desktop read/send tools without MCP authentication

CVSS Score

0.0

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-306 CWE-862
Vendor	dtwang
Product	line-desktop-mcp
Published	Jun 19, 2026

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Affected Versions

dtwang / line-desktop-mcp

< 1.1.2

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/dtwang/line-desktop-mcp/security/advisories/GHSA-4hf8-5mjm-rfgq github.com: https://github.com/dtwang/line-desktop-mcp/commit/680617894981ea93f8f6ceb51ecde7519754d501