Model Context Protocol TypeScript SDK: Shared transport or server instances delivered one HTTP client's messages to another

Özet

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The Model Context Protocol TypeScript SDK provides TypeScript client and server implementations of the Model Context Protocol. From 2.0.0 until 2.3.0 in @modelcontextprotocol/server, applications that shared one stateless HTTP transport or one McpServer or Server instance among multiple clients could deliver responses and notifications to the wrong client. The affected surface is an MCP server reached over HTTP by multiple clients. The trigger is reuse of one stateless transport or server instance. Messages were associated with a connection using only the JSON-RPC request identifier. SDK clients start request identifiers at zero, so collisions occur in normal operation. Cross-client delivery exposes one client's responses and notifications to another client. The issue requires an HTTP endpoint reachable by more than one client and an application that constructs the server or transport once at startup instead of once per request or session. stdio servers and factory-created per-call servers are not affected. Upgrading causes reused instances to fail and therefore requires an application code change. This issue is fixed in @modelcontextprotocol/server 2.3.0.

Etkilenen sürümler2 yazılım

Kaynaklar7 kaynak

• CVE.org kaydı
• NVD kaydı
• github.com/…pt-sdk/security/advisories/GHSA-jm63-cq47-j5jp Diğer
• github.com/modelcontextprotocol/typescript-sdk/pull/2918 Diğer
• github.com/…ommit/84804c22e45a662675a198f853b7f00063838a8d Diğer
• github.com/…extprotocol/typescript-sdk/releases/tag/1.32.0 Diğer
• github.com/…eleases/tag/@modelcontextprotocol/server@2.3.0 Diğer

Kayıt geçmişi

1. 6 Kas 2026 00:28Yayımlandı

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