EUVD-2026-77175

In Oraios AI Serena before 1.0.0, the listen address of the MCP server in HTTP mode is 0.0.0.0. NOTE: the Supplier observed that 0.0.0.0 was a "potential security hazard" but the Serena documentation, at the time of the issue report proposing 127.0.0.1 instead of 0.0.0.0, recommended "use a...

CVE-2026-38924

CVE-2026-38924 affects Oraios AI Serena prior to 1.0.0 , where the MCP server in HTTP mode binds its listen address to 0.0.0.0 (all interfaces) rather than 127.0.0.1. The supplier acknowledged this as a "potential security hazard," though documentation at the time recommended running Serena in a ...

CVE-2026-38924

In Oraios AI Serena before 1.0.0, the listen address of the MCP server in HTTP mode is 0.0.0.0. NOTE: the Supplier observed that 0.0.0.0 was a "potential security hazard" but the Serena documentation, at the time of the issue report proposing 127.0.0.1 instead of 0.0.0.0, recommended "use a...

Improper Authorization

n8n-mcp is vulnerable to Improper Authorization. The vulnerability is due to insufficient tenant isolation in multi-tenant HTTP mode, which allows an authenticated tenant to access locally stored workflow version backups outside of its assigned tenant scope...

CVE-2026-54052

n8n-MCP is an MCP server that provides AI assistants access to n8n node documentation, properties, and operations. Prior to 2.56.1, in HTTP mode with multi-tenancy enabled through ENABLEMULTITENANT=true, n8n-mcp's local workflow version history backups were not isolated per tenant, allowing an...

CVE-2026-55608 n8n-MCP: Incorrect authorization can expose default-scope workflow version backups in multi-tenant HTTP mode

n8n-MCP is an MCP server that provides AI assistants access to n8n node documentation, properties, and operations. Prior to 2.57.4, multi-tenant HTTP mode with ENABLEMULTITENANT=true could allow an authenticated tenant to access default-scope workflowversions backups instead of being confined to...

CVE-2026-55608

n8n-mcp prior to 2.57.4 is affected. In multi-tenant HTTP mode (ENABLE_MULTI_TENANT=true), an authenticated MCP HTTP tenant could access default-scope workflow_versions backups rather than its own tenant scope, potentially reading or deleting backups from prior single-tenant deployments or migrat...

NPM: n8n-MCP: Incorrect authorization can expose default-scope workflow version backups in multi-tenant HTTP mode

NPM: n8n-MCP: Incorrect authorization can expose default-scope workflow version backups in multi-tenant HTTP mode vulnerability discovered by ? in WordPress Npm n8n-mcp versions = 2.57.3...

PT-2026-60101

Name of the Vulnerable Software and Affected Versions netlicensing-mcp version 0.1.5 Description When running in HTTP transport mode, the software fails to enforce authentication in the ApiKeyMiddleware. Requests that do not provide a client API key are unconditionally forwarded to the next...

CVE-2026-55605 @arikusi/deepseek-mcp-server Missing Authentication on Self-Hosted HTTP MCP Endpoint

DeepSeek MCP Server is an MCP server for DeepSeek V4. Starting in version 1.4.2 and prior to version 1.8.0, the self-hosted HTTP transport of @arikusi/deepseek-mcp-server exposes POST /mcp without any authentication: createMcpExpressApp is called without an authProvider and no middleware guards t...

PT-2026-56972

Name of the Vulnerable Software and Affected Versions @arikusi/deepseek-mcp-server versions 1.4.2 through 1.7.x Description The self-hosted HTTP transport of the server exposes the POST /mcp endpoint without authentication. This occurs because the createMcpExpressApp function is called without an...

CVE-2026-48529 GitHub MCP Server: Lockdown mode singleton in HTTP server causes cross-user GraphQL client confusion

GitHub MCP Server is GitHub's official MCP Server. From 0.22.0 until 1.1.2, when running in HTTP mode with --lockdown-mode enabled, the RepoAccessCache is implemented as a process-global singleton initialized with the first authenticated user's GraphQL client. All subsequent requests from differe...

CVE-2026-48529

GitHub MCP Server is GitHub's official MCP Server. From 0.22.0 until 1.1.2, when running in HTTP mode with --lockdown-mode enabled, the RepoAccessCache is implemented as a process-global singleton initialized with the first authenticated user's GraphQL client. All subsequent requests from differe...

GHSA-PJP5-FPMR-3349 GitHub MCP Server: Lockdown mode singleton in HTTP server causes cross-user GraphQL client confusion

Summary When running in HTTP mode with --lockdown-mode enabled, the RepoAccessCache is implemented as a process-global singleton initialized with the first authenticated user's GraphQL client. All subsequent requests from different users share this singleton and their lockdown-related GraphQL...

PT-2026-52644

Name of the Vulnerable Software and Affected Versions GitHub MCP Server versions 0.22.0 through 1.1.1 Description When operating in HTTP mode with --lockdown-mode enabled, the RepoAccessCache is implemented as a process-global singleton. This singleton is initialized using the GraphQL client of t...

CVE-2026-49357

CVE-2026-49357 affects line-desktop-mcp (LINE Desktop MCP). In --http-mode, the MCP server binds to 0.0.0.0 and exposes the /mcp endpoint without MCP authentication, enabling any network client on the port to initialize a session, list tools, and call tools that read LINE Desktop chat history or ...

CVE-2026-49357 Streamable HTTP mode exposes LINE Desktop read/send tools without MCP authentication

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 t...

CVE-2026-45707

n8n-MCP is an MCP server that provides AI assistants access to n8n node documentation, properties, and operations. Prior to 2.51.2, when ENABLEMULTITENANT=true, the HTTP transport documents that the target n8n instance is selected per-request from x-n8n-url / x-n8n-key headers. Requests that...

CVE-2026-45707

n8n-MCP is an MCP server that provides AI assistants access to n8n node documentation, properties, and operations. Prior to 2.51.2, when ENABLEMULTITENANT=true, the HTTP transport documents that the target n8n instance is selected per-request from x-n8n-url / x-n8n-key headers. Requests that...

Failing Open

Overview n8n-mcp is an Integration between n8n workflow automation and Model Context Protocol MCP Affected versions of this package are vulnerable to Failing Open when handing multi-tenant HTTP requests ENABLEMULTITENANT=true containing one or neither of the x-n8n-url and x-n8n-key headers. An...