Is CVE-2026-25536 actively exploited?

CVE-2026-25536 has no public evidence of in-the-wild exploitation as of 2026-03-18.

What is the CVSS score for CVE-2026-25536?

CVE-2026-25536 has a CVSS score of 7.1 (HIGH severity). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N.

How do I patch CVE-2026-25536?

Patch guidance is available from lfprojects security advisories. CVEDatabase generates AI-assisted remediation guidance on demand for CVE-2026-25536.

Which products are affected by CVE-2026-25536?

1 product: lfprojects mcp typescript sdk.

Fix CVE-2026-25536 - HIGH lfprojects mcp typescript sdk

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.

CVSS Metrics

Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N
Attack Vector: network
Complexity: low
Privileges: low
User Action: none
Scope: unchanged
Confidentiality: high
Integrity: low
Availability: none
Weaknesses: CWE-362 · Race Condition

Metadata

Primary Vendor: LFPROJECTS
Published: 2/4/2026
Last Modified: 3/18/2026
Source: NIST NVD
Note: Verify all details with official vendor sources before applying patches.

Affected Products

lfprojects : mcp_typescript_sdk

Remediation Guidance

Executive Summary

Cite this page

CVE-2026-25536. CVEDatabase.com. Retrieved 1 May 2026. https://cvedatabase.com/cve/CVE-2026-25536

View on NIST NVD

CVE-2026-25536 vulnerability