CVE-2026-49357

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.

CVSS

No CVSS.

References

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

Configurations

No configuration.

History

26 Oct 2026, 11:10

Type	Values Removed	Values Added
Summary		(es) Line Desktop MCP es un proyecto que, aunque no está afiliado con el line-bot-mcp-server oficial, permite a los usuarios operar directamente la aplicación LINE Desktop en Windows o Mac a través de MCP. ’line-desktop-mcp’ soporta un transporte HTTP Streamable en modo ’--http-mode’ para su uso con clientes como n8n. En este modo, el servidor se enlaza a ’0.0.0.0’ y expone el endpoint MCP ’/mcp’ sin una verificación de autenticación a nivel de MCP. Antes de la versión 1.1.2, cualquier cliente de red que pueda alcanzar el puerto puede inicializar una sesión, listar herramientas y llamar a herramientas que leen el historial de chat de LINE Desktop o envían mensajes de LINE a través de la aplicación de escritorio ya iniciada. La versión 1.1.2 corrige el problema.

Information

Published : 2026-06-19 14:16

Updated : 2026-10-26 11:10

NVD link : CVE-2026-49357

Mitre link : CVE-2026-49357

CVE.ORG link : CVE-2026-49357

JSON object : View

Products Affected

No product.

CWE

CWE-306

Missing Authentication for Critical Function

CWE-862

Missing Authorization

{"id": "CVE-2026-49357", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-49357", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-06-22T15:48:03.889588Z"}}], "cvssMetricV40": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"Safety": "NOT_DEFINED", "version": "4.0", "Recovery": "NOT_DEFINED", "baseScore": 8.8, "Automatable": "NOT_DEFINED", "attackVector": "NETWORK", "baseSeverity": "HIGH", "valueDensity": "NOT_DEFINED", "vectorString": "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", "exploitMaturity": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED", "userInteraction": "NONE", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "subIntegrityImpact": "NONE", "vulnIntegrityImpact": "LOW", "integrityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "vulnAvailabilityImpact": "NONE", "availabilityRequirement": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "subConfidentialityImpact": "NONE", "vulnConfidentialityImpact": "HIGH", "confidentialityRequirement": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED"}}]}, "affected": [{"source": "security-advisories@github.com", "affectedData": [{"vendor": "dtwang", "product": "line-desktop-mcp", "versions": [{"status": "affected", "version": "< 1.1.2"}]}]}], "published": "2026-06-19T14:16:23.667", "references": [{"url": "https://github.com/dtwang/line-desktop-mcp/commit/680617894981ea93f8f6ceb51ecde7519754d501", "source": "security-advisories@github.com"}, {"url": "https://github.com/dtwang/line-desktop-mcp/security/advisories/GHSA-4hf8-5mjm-rfgq", "source": "security-advisories@github.com"}], "vulnStatus": "Deferred", "weaknesses": [{"type": "Secondary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-306"}, {"lang": "en", "value": "CWE-862"}]}], "descriptions": [{"lang": "en", "value": "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."}, {"lang": "es", "value": "Line Desktop MCP es un proyecto que, aunque no est\u00e1 afiliado con el line-bot-mcp-server oficial, permite a los usuarios operar directamente la aplicaci\u00f3n LINE Desktop en Windows o Mac a trav\u00e9s de MCP. \u2019line-desktop-mcp\u2019 soporta un transporte HTTP Streamable en modo \u2019--http-mode\u2019 para su uso con clientes como n8n. En este modo, el servidor se enlaza a \u20190.0.0.0\u2019 y expone el endpoint MCP \u2019/mcp\u2019 sin una verificaci\u00f3n de autenticaci\u00f3n a nivel de MCP. Antes de la versi\u00f3n 1.1.2, cualquier cliente de red que pueda alcanzar el puerto puede inicializar una sesi\u00f3n, listar herramientas y llamar a herramientas que leen el historial de chat de LINE Desktop o env\u00edan mensajes de LINE a trav\u00e9s de la aplicaci\u00f3n de escritorio ya iniciada. La versi\u00f3n 1.1.2 corrige el problema."}], "lastModified": "2026-10-26T11:10:00.157", "sourceIdentifier": "security-advisories@github.com"}