CVE-2026-111767

High

Description

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 each other's tasks. This issue has been patched in version 1.32.0.

SeverityHigh

CVSS8.6

Exploit probability—

Product@modelcontextprotocol/sdk

PublishedOct 20, 2026

First seenOct 20, 2026

Weakness typeCWE-639Authorization bypass through user-controlled key CWE-862Missing authorization

How to fix

Update

@modelcontextprotocol/sdk1.32.0 or later

Affected products

Product	Affected versions	Fixed in
@modelcontextprotocol/sdknpm	1.24.0 ≤ v < 1.32.0	1.32.0

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