CVE-2026-104850— MCP TypeScript SDK OAuth凭据泄露漏洞
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。
以下是该漏洞描述信息的中文翻译： --- MCP TypeScript SDK 是 Model Context Protocol（模型上下文协议）服务器和客户端的官方 TypeScript SDK。从版本 1.12.0 开始，直到版本 1.31.0 和 2.2.0 之前，该 SDK 的 OAuth 客户端支持允许 MCP 服务器与其连接的客户端共同决定哪个授权服务器可以接收客户端的 OAuth 凭证。这些预先配置和预置的凭证并未绑定到它们所属的授权服务器。一个恶意或被入侵的 MCP 服务器可以在其受保护的资源元数据
可能的 ATT&CK 技术 1 AI
T1552.001 · Credentials In Files影响版本矩阵 2
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| modelcontextprotocol | typescript-sdk | >= 1.12.0, < 1.31.0 |
affected |
>= 2.0.0, < 2.2.0 |
affected |
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一、 漏洞 CVE-2026-104850 基础信息
漏洞信息
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Vulnerability Title
MCP TypeScript SDK: OAuth client could send credentials to an authorization server chosen by the MCP server
来源: CVE Program / CVE List V5
Vulnerability Description
MCP TypeScript SDK is the official TypeScript SDK for Model Context Protocol servers and clients. Starting in version 1.12.0 and prior to versions 1.31.0 and 2.2.0, the SDK's OAuth client support let the MCP server a client connected to decide which authorization server received the client's OAuth credentials. Stored and pre-provisioned credentials were not bound to the authorization server they belong to. A malicious or compromised MCP server could name its own authorization server in its protected resource metadata. Without any user interaction, the client would send that server the `refresh_token` and `client_secret` stored from an earlier sign-in (1.x), or the configured `client_secret` or signed assertion of a bundled non-interactive provider (1.x and 2.x). Only those applications that use the SDK as an MCP client over HTTP with an `authProvider`: your own `OAuthClientProvider`, or the bundled `ClientCredentialsProvider`, `PrivateKeyJwtProvider`, `StaticPrivateKeyJwtProvider` or (2.x) `CrossAppAccessProvider` and that may connect to an MCP server the owners does not fully trust while holding credentials for a legitimate authorization server are affected. `@modelcontextprotocol/sdk` 1.31.0 (1.x) and `@modelcontextprotocol/client` 2.2.0 (2.x) patch the issue. A workaround for those who cannot upgrade is available. 2.0.0 and 2.1.0 already accept `expectedIssuer`. On 1.x, the only workaround is to connect OAuth-enabled clients only to MCP servers you trust.
来源: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
来源: CVE Program / CVE List V5
Vulnerability Type
对数据真实性的验证不充分
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 | >= 1.12.0, < 1.31.0 | - |
|
二、漏洞 CVE-2026-104850 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
AI 生成 POC
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CVE-2026-104850 补丁与修复 (1)
CVE-2026-104850 厂商安全公告 (1)
IV. Related Vulnerabilities
V. Comments for CVE-2026-104850
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