CVE-2026-111767 MCP TypeScript SDK: Experimental tasks were not tied to the session that created them

MCP TypeScript SDK is the official TypeScript SDK for Model Context Protocol servers and clients. From version 1.24.0 to before version 1.32.0, the experimental tasks feature taskStore did not check which session created a task. Clients sharing one InMemoryTaskStore could list, read and cancel ea...

CVE-2026-111767 MCP TypeScript SDK: Experimental tasks were not tied to the session that created them

MCP TypeScript SDK is the official TypeScript SDK for Model Context Protocol servers and clients. From version 1.24.0 to before version 1.32.0, the experimental tasks feature taskStore did not check which session created a task. Clients sharing one InMemoryTaskStore could list, read and cancel ea...

EUVD-2026-105256

MCP TypeScript SDK is the official TypeScript SDK for Model Context Protocol servers and clients. From version 1.24.0 to before version 1.32.0, the experimental tasks feature taskStore did not check which session created a task. Clients sharing one InMemoryTaskStore could list, read and cancel ea...

CVE-2026-111767

The MCP TypeScript SDK (@modelcontextprotocol/sdk) versions 1.24.0 through 1.31.0 are vulnerable due to a flaw in the experimental taskStore feature. The root cause is that tasks were not tied to specific sessions, allowing clients sharing a single InMemoryTaskStore to unauthorizedly list, read, ...

GHSA-22JM-H49P-29QW MCP TypeScript SDK: Experimental tasks were not tied to the session that created them

Summary In affected versions, the experimental tasks feature taskStore did not check which session created a task. Clients sharing one InMemoryTaskStore could list, read and cancel each other's tasks. Experimental tasks are deprecated. The 2026-07-28 specification replaced them with a redesigned...

MCP TypeScript SDK: Experimental tasks were not tied to the session that created them

Summary In affected versions, the experimental tasks feature taskStore did not check which session created a task. Clients sharing one InMemoryTaskStore could list, read and cancel each other's tasks. Experimental tasks are deprecated. The 2026-07-28 specification replaced them with a redesigned...

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...