Detections
Analytics

Echo: @modelcontextprotocol/sdk: security update to 1.26.0

high Tenable Cloud Security Plugin ID 457070

Description

There are packages installed that are affected by a vulnerability referenced in the following CVE:

 - 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. (CVE-2026-25536)

Solution

Update the @modelcontextprotocol/sdk library and its related packages to version 1.26.0 or later.

See Also

https://advisory.echohq.com/cve/CVE-2026-25536

Plugin Details

Severity: High

ID: 457070

Version: Revision 1.1

Type: Local

Published: 10/2/2026

Updated: 10/5/2026

Supported Sensors: Tenable Cloud Security, Tenable Self-Hosted Container Security

Risk Information

VPR

Risk Factor: Low

Score: 3.5

Percentile: 52.04

CVSS v2

Risk Factor: High

Base Score: 7.5

Temporal Score: 5.5

Vector: CVSS2#AV:N/AC:L/Au:S/C:C/I:P/A:N

CVSS Score Source: CVE-2026-25536

CVSS v3

Risk Factor: High

Base Score: 7.1

Temporal Score: 6.2

Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

Exploit Ease: No known exploits are available

Patch Publication Date: 9/28/2026

Vulnerability Publication Date: 2/4/2026

Reference Information

CVE: CVE-2026-25536