CVE-2026-49357

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Source

https://cve.org/CVERecord?id=CVE-2026-49357

Import Source

https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-49357.json

JSON Data

https://api.osv.dev/v1/vulns/CVE-2026-49357

Aliases

GHSA-4hf8-5mjm-rfgq

Published

2026-06-19T13:11:08Z

Modified

2026-08-12T03:51:32Z

Severity

8.8 (High) CVSS_V4 - 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 CVSS Calculator

Summary

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

Details

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.

Database specific

{
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-306",
        "CWE-862"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/49xxx/CVE-2026-49357.json",
    "unresolved_ranges": [
        {
            "extracted_events": [
                {
                    "fixed": "1.1.2"
                }
            ],
            "source": "AFFECTED_FIELD"
        }
    ]
}

References

Affected packages

Git / github.com/dtwang/line-desktop-mcp

Affected ranges

Type

GIT

Repo

https://github.com/dtwang/line-desktop-mcp

Events

Introduced

Fixed

680617894981ea93f8f6ceb51ecde7519754d501

Database specific

Show details

{
    "source": "REFERENCES"
}

Database specific

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-49357.json"