CVE-2026-25536

HIGH
2026-02-04 [email protected] GHSA-345p-7cg4-v4c7
7.1
CVSS 3.1
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CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N
Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
Low
Availability
None

Lifecycle Timeline

3
Patch Released
Mar 31, 2026 - 21:13 nvd
Patch available
Analysis Generated
Mar 12, 2026 - 21:54 vuln.today
CVE Published
Feb 04, 2026 - 22:15 nvd
HIGH 7.1

Tags

Race Condition Information Disclosure Mcp Typescript Sdk Redhat

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.

Analysis

MCP TypeScript SDK is the official TypeScript SDK for Model Context Protocol servers and clients. [CVSS 7.1 HIGH]

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Remediation

Within 24 hours: Identify all systems and applications using MCP TypeScript SDK and document affected inventory. Within 7 days: Implement network segmentation to restrict MCP component communication and increase monitoring for suspicious activity. …

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Priority Score

36
Low Medium High Critical
KEV: 0
EPSS: +0.0
CVSS: +36
POC: 0

Vendor Status

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CVE-2026-25536 vulnerability details – vuln.today
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