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

Quick assessment

Affected
modelcontextprotocol typescript-sdk
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

MCP TypeScript SDK 是模型上下文协议（Model Context Protocol）服务器和客户端的官方 TypeScript 开发工具包。在 1.24.0 至 1.32.0（不含）的版本范围内，实验性任务功能（taskStore）未验证创建任务的会话身份。若多个客户端共享同一个 InMemoryTaskStore，它们便能列出、读取并取消彼此的任务。该问题已在 1.32.0 版本中修复。

CVSS 8.6 · High

Possible ATT&CK Techniques 2 AI

T1562 T1083 · File and Directory Discovery

Affected Version Matrix 1

VendorProduct Version RangeStatus
modelcontextprotocol typescript-sdk >= 1.24.0, < 1.32.0 affected
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I. Basic Information for CVE-2026-111767

Vulnerability Information
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Vulnerability Title
MCP TypeScript SDK: Experimental tasks were not tied to the session that created them
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
通过用户控制密钥绕过授权机制
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
modelcontextprotocol typescript-sdk >= 1.24.0, < 1.32.0 -

II. Public POCs for CVE-2026-111767

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III. Intelligence Information for CVE-2026-111767

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Other References for CVE-2026-111767 (3)

IV. Related Vulnerabilities

Same product: typescript-sdk
Same vendor: modelcontextprotocol
Same weakness: CWE-639

V. Comments for CVE-2026-111767

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