VULNERABILITY INTELLIGENCE

CVE-2026-25536

CVSS score7.1 HIGH
EPSS probability0.29%
CISA KEVNot currently listed
Published2026-02-04
Last modified2026-07-15
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N

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.

Weakness classification

  • security-advisories@github.com: CWE-362
  • 0b0ca135-0b70-47e7-9f44-1890c2a1c46c: CWE-367

Primary references