CVE-2026-111771— Model Context Protocol SDK 服务器跨服务令牌认证漏洞
一分钟漏洞结论
影响对象
modelcontextprotocol typescript-sdk
利用判断
尚无明确在野利用证据，仍需结合暴露面评估
建议动作
优先检查厂商安全公告和参考链接中的修复版本；无法立即升级时，限制受影响服务暴露并加强监测。
Model Context Protocol（MCP）TypeScript SDK 提供了 MCP 协议的 TypeScript 客户端和服务端实现。在以下版本范围内存在安全漏洞： ：从 1.6.0 到 1.32.0（不含 1.32.0） ：从 2.0.0 到 2.3.0（不含 2.3.0） ：从 2.0.0 到 2.0.2（不含 2.0.2） ：从 2.0.0 到 2.3.1（不含 2.3.1） 由于 SDK 未对令牌（token）的受众（audience）进行强制校验，服务端在验证 HTTP Bearer 认证
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一、 漏洞 CVE-2026-111771 基础信息
漏洞信息
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Vulnerability Title
Model Context Protocol TypeScript SDK: Server bearer authentication accepted tokens issued for another service
来源: CVE Program / CVE List V5
Vulnerability Description
The Model Context Protocol TypeScript SDK provides TypeScript client and server implementations of the Model Context Protocol. From 1.6.0 until 1.32.0 in @modelcontextprotocol/sdk, from 2.0.0 until 2.3.0 in @modelcontextprotocol/server, from 2.0.0 until 2.0.2 in @modelcontextprotocol/express, and from 2.0.0 until 2.3.1 in @modelcontextprotocol/server-legacy, server-side bearer authentication could accept a valid access token issued for a different service because the SDK did not enforce the token audience. The affected surface is server-side HTTP bearer authentication. The trigger is a valid token whose audience names another service. The authorization server must issue tokens for multiple services, and the application's verifyAccessToken() must not independently validate aud. Applications already validating aud inside verifyAccessToken() are not affected. An attacker with a token for another service could authenticate to the MCP server and obtain the confidentiality and integrity capabilities granted to an authenticated caller. Upgrading alone leaves the new audience validation disabled. Operators must enable audience validation and provide the token audience together. Enabling only the expected audience check causes every request to receive HTTP 401. This issue is fixed in @modelcontextprotocol/sdk 1.32.0, @modelcontextprotocol/server 2.3.0, @modelcontextprotocol/express 2.0.2, and @modelcontextprotocol/server-legacy 2.3.1.
来源: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N
来源: CVE Program / CVE List V5
Vulnerability Type
授权机制不正确
来源: CVE Program / CVE List V5
受影响产品
| 厂商 | 产品 | 影响版本 | CPE | 订阅 |
|---|---|---|---|---|
| modelcontextprotocol | typescript-sdk | >= 1.6.0, < 1.32.0 | - |
|
| @modelcontextprotocol | sdk | >= 1.6.0, < 1.32.0 | - |
|
| @modelcontextprotocol | server | >= 2.0.0, < 2.3.0 | - |
|
| @modelcontextprotocol | express | >= 2.0.0, < 2.0.2 | - |
|
| @modelcontextprotocol | server-legacy | >= 2.0.0, < 2.3.1 | - |
|
二、漏洞 CVE-2026-111771 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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CVE-2026-111771 其他参考 (11)
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https://github.com/modelcontextprotocol/typescript-sdk/pull/2952 x_refsource_MISC
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https://github.com/modelcontextprotocol/typescript-sdk/pull/2929 x_refsource_MISC
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https://github.com/modelcontextprotocol/typescript-sdk/pull/2930 x_refsource_MISC
同批安全公告 · modelcontextprotocol · 2026-11-05 · 共 4 条
| CVE-2026-111770 | 7.7 HIGH | Model Context Protocol SDK 消息泄露漏洞 |
| CVE-2026-111768 | 7.5 HIGH | MCP TypeScript SDK 拒绝服务漏洞 |
| CVE-2026-111769 | 6.5 MEDIUM | Model Context Protocol SDK 跨站重定向及信息泄露漏洞 |