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highCVSS 8.8NVD status: Deferred

CVE-2026-49357

n8n: 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.

Componentn8n
Severityhigh (CVSS 8.8)
CVSS vectorCVSS: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
Published (NVD)2026-06-19
Last modified2026-06-23
Affected versions
< 1.1.2
read from the advisory text: NVD has not published CPE data yet
Fixed in1.1.2
WeaknessCWE-306CWE-862
CISA KEVnot listed

NVD 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.

Does CVE-2026-49357 hit the version you run?Paste your docker-compose.yml, requirements.txt or package.json. The scanner checks your pinned versions against this CVE and every other one we track for n8n.
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What to do

  • Upgrade n8n to 1.1.2 or later.
  • Do not expose the component's API or UI to the internet without authentication in front of it.

Sources

Read more

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