CVE-2026-108721 Open Computer Use through 1.0.0 Denylist Bypass via Case-Variant Bundle ID

Open Computer Use through 1.0.0 on macOS contains an improper case sensitivity handling vulnerability that allows local MCP callers to bypass the password-manager denylist using case-variant bundle identifiers. Attackers, including prompt-injected model turns, can pass identifiers like...

local-mcp

local-mcp Zero-dependency MCP server for local file operations. 13 filesystem tools + 3 meta-tools for progressive discovery — no SDKs, no frameworks, no npm install needed. MCP Protocol: 2024-11-05 · Transport: stdio + Streamable HTTP · Runtime: Node.js ≥ 22.0.0 Architecture local-mcp.mjs — 595...

CVE-2026-55529 PraisonAI: Origin validation bypass in MCP HTTP Stream transport allows browser-mediated unauthenticated tool execution on local MCP server

PraisonAI is a multi-agent teams system. Prior to praisonai 4.6.58, the MCP HTTP Stream validateorigin method accepts requestorigin.startswithallowed, so the attacker-controlled localhost.evil.example HTTP origin matches the localhost allowlist. Without an API key, a malicious webpage can submit...

MCP Ruby SDK: Streamable HTTP transport lacks DNS-rebinding (Host/Origin) protection

Summary MCP::Server::Transports::StreamableHTTPTransport the Rack-mountable Streamable HTTP transport in the mcp gem processes every incoming JSON-RPC request without ever inspecting the HTTP Host or Origin request headers. There is no AllowedHosts/AllowedOrigins allowlist and no DNS-rebinding...

EUVD-2026-50489

MCP Ruby SDK: Streamable HTTP transport lacks DNS-rebinding Host/Origin protection...

CVE-2026-63118

MCP Ruby SDK is the official Ruby SDK for Model Context Protocol servers and clients. Prior to 0.23.0, MCP::Server::Transports::StreamableHTTPTransport in the mcp gem does not validate the HTTP Host or Origin request headers, which allows a malicious browser page to use DNS rebinding to reach a...

Malicious Package

Overview local-mcp is a malicious package. This package contains malicious code, and its content was removed from the official package manager. While this package might be attempting to impersonate a valid organization, there is no connection between that organization and this package authorship...

Streamable HTTP transport lacks DNS-rebinding (Host/Origin) protection

Summary MCP::Server::Transports::StreamableHTTPTransport the Rack-mountable Streamable HTTP transport in the mcp gem processes every incoming JSON-RPC request without ever inspecting the HTTP Host or Origin request headers. There is no AllowedHosts/AllowedOrigins allowlist and no DNS-rebinding...

PT-2026-53798

Impact Uni-CLI versions before 0.225.2 exposed the legacy JSON-RPC-over-HTTP MCP transport on loopback without validating browser Origin headers before routing requests. A malicious web page could send a CORS simple POST request, such as text/plain, to the local /mcp endpoint and deliver a JSON-R...

Malicious code in local-mcp (npm)

--- -= Per source details. Do not edit below this line.=- Source: amazon-inspector 4649a6cac828460ea4a3e6d867038eaa507f109eb6a46de9eef1fc340d867608 The package executes lifecycle and import-time code that fetches executables and posts host data to off-publisher infrastructure. download.js line 92...

MAL-2026-4601 Malicious code in local-mcp (npm)

--- -= Per source details. Do not edit below this line.=- Source: amazon-inspector 4649a6cac828460ea4a3e6d867038eaa507f109eb6a46de9eef1fc340d867608 The package executes lifecycle and import-time code that fetches executables and posts host data to off-publisher infrastructure. download.js line 92...

GHSA-89VP-X53W-74FX rmcp Streamable HTTP server transport has a DNS rebinding vulnerability

Summary Prior to version 1.4.0, the rmcp crate's Streamable HTTP server transport crates/rmcp/src/transport/streamablehttpserver/ did not validate the incoming Host header. This allowed a malicious public website, via a DNS rebinding attack, to send authenticated requests to an MCP server running...

EUVD-2026-21061

Apollo MCP Server is a Model Context Protocol server that exposes GraphQL operations as MCP tools. Prior to version 1.7.0, the Apollo MCP Server did not validate the Host header on incoming HTTP requests when using StreamableHTTP transport. In configurations where an HTTP-based MCP server is run ...

DNS Rebinding

@modelcontextprotocol/sdk is vulnerable to DNS Rebinding. The vulnerability is due to DNS rebinding protection being disabled by default in unauthenticated HTTP-based servers, which allows an attacker to exploit a malicious website to bypass same-origin policy and send requests to the local MCP...

CVE-2025-10193 Neo4j Cypher MCP server is vulnerable to DNS rebinding attacks

DNS rebinding vulnerability in Neo4j Cypher MCP server allows malicious websites to bypass Same-Origin Policy protections and execute unauthorised tool invocations against locally running Neo4j MCP instances. The attack relies on the user being enticed to visit a malicious website and spend...