CVE-2026-25536 - @modelcontextprotocol/sdk has cross-client data leak via shared server/transport instance reuse

CVE-2026-25536 - @modelcontextprotocol/sdk has cross-client data leak via shared server/transport instance reuse

https://cvefeed.io/rssfeed/latest.atom / Wed, 02/04/2026 - 23:00
CVE ID : CVE-2026-25536
Published : Feb. 4, 2026, 9:29 p.m. | 19 minutes ago
Description : MCP TypeScript SDK is the official TypeScript SDK for Model Context Protocol servers and clients. From version 1.10.0 to 1.25.3, cross-client response data leak when a single McpServer/Server and transport instance is reused across multiple client connections, most commonly in stateless StreamableHTTPServerTransport deployments. This issue has been patched in version 1.26.0.
Severity: 0.0 | NA
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