CVE-2026-90898

Bifrost registers MCP clients through its management API. A stdio client is a command plus args. Bifrost starts that program in the gateway the moment the client is added. No MCP handshake required. The default is governance.authconfig.isenabled=false. Auth off means every caller is a local admin...

CVE-2026-90898

Bifrost (by maximhq) is vulnerable to unauthenticated remote code execution through its MCP stdio client registration endpoint. When a stdio client is registered via POST /api/mcp/client, Bifrost immediately spawns the specified command in the gateway—no MCP handshake required. By default, authen...

CVE-2026-90898: Missing Authentication for Critical Function

Bifrost registers MCP clients through its management API. A stdio client is a command plus args. Bifrost starts that program in the gateway the moment the client is added. No MCP handshake required. The default is governance.authconfig.isenabled=false. Auth off means every caller is a local admin...

PT-2026-65889

Name of the Vulnerable Software and Affected Versions mcp versions prior to 0.23.0 Description The MCP::Server::Transports::StdioTransport and MCP::Client::Stdio components in the mcp gem use the IOgets function without a byte limit. This allows a peer that sends data without a newline character ...

CVE-2026-6130

A flaw has been found in chatboxai chatbox up to 1.20.0. This impacts the function StdioClientTransport of the file src/main/mcp/ipc-stdio-transport.ts of the component Model Context Protocol Server Management System. Executing a manipulation of the argument args/env can lead to os command...

CVE-2026-6130 chatboxai chatbox Model Context Protocol Server Management System ipc-stdio-transport.ts StdioClientTransport os command injection

A flaw has been found in chatboxai chatbox up to 1.20.0. This impacts the function StdioClientTransport of the file src/main/mcp/ipc-stdio-transport.ts of the component Model Context Protocol Server Management System. Executing a manipulation of the argument args/env can lead to os command...

CVE-2026-6130

CVE-2026-6130 affects chatboxai up to version 1.20.0, impacting the StdioClientTransport function in src/main/mcp/ipc-stdio-transport.ts within the Model Context Protocol Server Management System. The root cause is a flaw where manipulating the argument list (args/env) enables os command injectio...

mcp-csharp-cmdexe-poc

MCP C SDK cmd.exe Argument Injection PoC Proof of concept fo...

Flowise Custom MCP Remote Code Execution

This module exploits a remote code execution vulnerability in Flowise versions = 2.2.7-patch.1 and use exploit/multi/http/flowise/custommcprce msf undefinedcustommcprce show actions ...actions... msf undefinedcustommcprce set ACTION msf undefinedcustommcprce show options ...show and set options...