Is CVE-2026-49357 actively exploited?

No active exploitation of CVE-2026-49357 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-49357 be exploited remotely?

Yes. CVE-2026-49357 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-49357?

CVE-2026-49357 has a CVSS score of 8.8 (HIGH).

HOME VULNERABILITIESCVE-2026-49357

HIGH

CVE-2026-49357

CWE-306Published: June 19, 2026· Updated: Jun 23, 2026

8.8

CVSS v3.1

Official 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.

NVD Source

Technical Analysis

CVE-2026-49357 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

CVSS v3.1 Vector Breakdown

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges Req.None

User InteractionNone

ScopeX

Impact

Confidentiality

Integrity

Availability

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