MCP Ruby SDK: Ruby SSE Session Poisoning

Summary Vulnerability: Missing Session Ownership Validation in the Ruby MCP SDK's Streamable and SSE HTTP transport implementation. Any attacker with a stolen session ID can execute tools with the victim's session. This is a silent attack - the victim's session is compromised and being used for...

The vulnerability of the Faraday::NestedParamsEncoder component in the HTTP client library for Ruby allows a attacker to trigger a service failure.

The vulnerability of the Faraday::NestedParamsEncoder component in the HTTP client library for Ruby lies in its uncontrolled recursion. Exploiting this vulnerability could allow a malicious actor to cause service failures...