MCP Python SDK: Experimental task handlers allow any client to access and cancel other clients' tasks

SummaryIn affected versions, the default request handlers installed by the experimental tasks feature server.experimental.enabletasks did not check which session created a task before acting on it. On a server with more than one connected client, any client could observe, read results from, and...

PT-2026-64091

Summary In affected versions, the default request handlers installed by the experimental tasks feature server.experimental.enable tasks did not check which session created a task before acting on it. On a server with more than one connected client, any client could observe, read results from, and...