CVE-2026-25536

HighCVSS 7.1/10Last modified Jul 15, 2026

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.

Metrics

CVSS 3.1 7.1/10CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N

Weakness enumeration

CWE-362 CWE-367

Affected software

No affected versions have been published.

Timeline

Published: Feb 4, 2026
Last modified: Jul 15, 2026
NVD status: Modified

Related CVEs from 2026

CVE-2026-255377.5jsonwebtoken is a JWT lib in rust. Prior to version 10.3.0, there is a Type Confusion vulnerability in jsonwebtoken, specifically, in its cl CVE-2026-255388.8Devtron is an open source tool integration platform for Kubernetes. In version 2.0.0 and prior, a vulnerability exists in Devtron's Attribut CVE-2026-255397.2SiYuan is a personal knowledge management system. Prior to version 3.5.5, the /api/file/copyFile endpoint does not validate the dest paramet CVE-2026-25548.1The WCFM – Frontend Manager for WooCommerce along with Bookings Subscription Listings Compatible plugin for WordPress is vulnerable to Insec CVE-2026-255406.5Mastodon is a free, open-source social network server based on ActivityPub. Prior to versions 4.3.19, 4.4.13, 4.5.6, Mastodon is vulnerable CVE-2026-255417.5Bytes is a utility library for working with bytes. From version 1.2.1 to before 1.11.1, Bytes is vulnerable to integer overflow in BytesMut:CVE-2026-255426.5Tekton Pipelines project provides k8s-style resources for declaring CI/CD-style pipelines. Starting in version 0.43.0 and prior to versions CVE-2026-255436.1HtmlSanitizer is a .NET library for cleaning HTML fragments and documents from constructs that can lead to XSS attacks. Prior to versions 9.CVE-2026-255449.8Payload is a free and open source headless content management system. Prior to 3.73.0, when querying JSON or richText fields, user input was CVE-2026-255458.6Astro is a web framework. Prior to version 9.5.4, Server-Side Rendered pages that return an error with a prerendered custom error page (eg. CVE-2026-255467.8Godot MCP is a Model Context Protocol (MCP) server for interacting with the Godot game engine. Prior to version 0.1.1, a command injection v CVE-2026-255479.2@isaacs/brace-expansion is a hybrid CJS/ESM TypeScript fork of brace-expansion. Prior to version 5.0.1, @isaacs/brace-expansion is vulnerabl